JPH05147481A - Cabin acoustic characteristic evaluating device - Google Patents

Cabin acoustic characteristic evaluating device

Info

Publication number
JPH05147481A
JPH05147481A JP31610891A JP31610891A JPH05147481A JP H05147481 A JPH05147481 A JP H05147481A JP 31610891 A JP31610891 A JP 31610891A JP 31610891 A JP31610891 A JP 31610891A JP H05147481 A JPH05147481 A JP H05147481A
Authority
JP
Japan
Prior art keywords
sound
vehicle
test vehicle
filters
acoustic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP31610891A
Other languages
Japanese (ja)
Inventor
Yoshikazu Hayakawa
良和 早川
Kiyoshi Nanbu
起可 南部
Hiroshi Imai
ひろし 今井
Akio Kinoshita
明生 木下
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP31610891A priority Critical patent/JPH05147481A/en
Publication of JPH05147481A publication Critical patent/JPH05147481A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To evaluate the traveling sound by listening to the traveling sound while a crew member id driving or riding and combining the sound of the inspected vehicle with the sounds of a plurality of reference vehicles according to the necessity. CONSTITUTION:A dummy head 2 whose left and right ear parts have each microphone 3 installed is installed at the getting-on position at an assistant driver's seat in a vehicle room 1, and a headphone 8 is installed at the left and right ear parts of a driver 7 as the inspected person in the same car room to the dummn head 2. When one filter corresponding to a desired reference vehicle is selected from among a plurality of filters 121 by operating a switch 13, the sound signal gathered by the microphone 3 is amplified by a preamplifier 4, and the sound signal of the reference vehicle is worked by the selected filter. After the sound signal which is worked to the sound signal of the reference vehicle is amplified by a main amplifier 6, the sound signal is regenerated to the sound by the headphone 8, and the regenerated sound is heared from the left and right ears of the driver 7.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、バイノーラル方式に近
似した形式で、車室内の音響特性を、リアルタイムで測
定評価する車室内音響特性評価装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle interior acoustic characteristic evaluation device for measuring and evaluating the acoustic characteristic of a vehicle interior in real time in a format similar to a binaural system.

【0002】[0002]

【従来の技術】本出願人は、特開平2−226999号
公報に開示されている車室内音響装置を提案した。この
従来の車室内音響装置は、図7に示すように、被験車1
内の助手席等の乗車位置にダミーヘッド2を設置し、こ
のダミーヘッド2の左右の耳部に取り付けられたマイク
ロホン3で乗員の耳位置に相当する条件下の走行時にお
ける車室内の騒音を集音し、この集音した音響信号をプ
リアンプ4で増幅し、この増幅した音響信号の周波数特
性を、グラフィックイコライザまたはボリュームなどの
手段5で変更し、この周波数特性を変更した音響信号を
メインアンプ6で増幅し、この増幅した音響信号を被験
車1のダミーヘッド2と同一の車室内に乗車した被検者
たる乗員7の左右の耳部に装着されたヘッドホン8で再
生する。これにより、乗員7が車両の走行に同期したエ
ンジン音等のような走行時の車室内1の騒音の周波数特
性をリアルタイムで加工しながら評価できるとともに、
音以外の加速感等の体感要素と音との関係も評価できる
ようになっている。
2. Description of the Related Art The present applicant has proposed a vehicle interior acoustic device disclosed in Japanese Patent Laid-Open No. 2-226999. This conventional vehicle interior acoustic device, as shown in FIG.
The dummy head 2 is installed at a passenger position such as inside the passenger seat, and the microphones 3 attached to the left and right ears of the dummy head 2 reduce noise in the passenger compartment during traveling under conditions corresponding to the occupant's ear position. Sound is collected, the collected acoustic signal is amplified by the preamplifier 4, the frequency characteristic of the amplified acoustic signal is changed by means 5 such as a graphic equalizer or a volume, and the acoustic signal with the changed frequency characteristic is changed to the main amplifier. 6, and the amplified acoustic signal is reproduced by the headphones 8 attached to the left and right ears of the occupant 7 as the subject who is in the same compartment as the dummy head 2 of the test vehicle 1. As a result, the occupant 7 can evaluate the frequency characteristic of the noise in the vehicle interior 1 during traveling, such as the engine sound synchronized with the traveling of the vehicle, in real time while processing it.
It is also possible to evaluate the relationship between sound and other sensational elements such as acceleration, other than sound.

【0003】[0003]

【発明が解決しようとする課題】前述した従来の車室内
音響特性評価装置にあっては、グラフィックイコライザ
またはボリームなどの手段5を手動操作することによ
り、マイクロホン3で集音した音響信号の周波数特性
(音圧)を変更してヘッドホン8で再生する構成である
ので、マイクロホン3で集音した音響信号を多数の参考
車の音響信号に迅速に加工することはできない。
In the above-mentioned conventional vehicle interior acoustic characteristic evaluation apparatus, the frequency characteristic of the acoustic signal collected by the microphone 3 is manually operated by the means 5 such as the graphic equalizer or the volume. Since the configuration is such that the (sound pressure) is changed and reproduced by the headphones 8, the acoustic signals collected by the microphone 3 cannot be quickly processed into the acoustic signals of many reference vehicles.

【0004】[0004]

【課題を解決するための手段】第1の発明は、被験車に
乗車した乗員の耳位置に相当する条件下に設置された集
音手段と、前記被験車に乗車した乗員の耳位置近傍に設
置された再生手段と、前記被験車の音響特性と複数の参
考車の音響特性との比を有する複数のフィルタと、この
複数のフィルタの中から1つのフィルタを選択し前記集
音手段で集音した音響信号をその選択した1つのフィル
タに通して前記再生手段に出力する選択手段と、を備え
ている。
According to a first aspect of the present invention, a sound collecting means is installed under a condition corresponding to an ear position of an occupant in a test vehicle, and a sound collecting means is provided near an ear position of an occupant in the test car. The installed reproduction means, a plurality of filters having a ratio of the acoustic characteristics of the test vehicle and the acoustic characteristics of a plurality of reference vehicles, and one filter is selected from the plurality of filters and collected by the sound collecting means. Selecting means for outputting the sounded sound signal through the selected one filter to the reproducing means.

【0005】第2の発明は、被験車に乗車した乗員の耳
位置に相当する条件下に設置された集音手段と、前記被
験車に乗車した乗員の耳位置近傍に設置された再生手段
と、前記集音手段で集音した音響信号を入力し、この入
力信号を音源と同期する同期成分とそれ以外のランダム
成分とに分岐抽出する抽出手段と、前記被験車の音響特
性と複数の参考車の音響特性との比を有する複数のフィ
ルタと、この複数のフィルタの中から1つのフィルタを
選択し前記抽出手段から出力される同期成分とランダム
成分とのいずれか一方の出力信号をその選択した1つの
フィルタを通して前記前記再生手段に出力する選択手段
と、を備えている。
According to a second aspect of the present invention, there is provided sound collecting means installed under a condition corresponding to an ear position of an occupant in the test vehicle, and reproducing means installed near an ear position of the occupant in the test vehicle. , Inputting an acoustic signal collected by the sound collecting means, and branching and extracting the input signal into a synchronous component that synchronizes with the sound source and a random component other than that, an acoustic characteristic of the test vehicle and a plurality of references A plurality of filters having a ratio with the acoustic characteristics of the vehicle, and one filter is selected from the plurality of filters, and one of the output signals of the synchronization component and the random component output from the extraction means is selected. Selecting means for outputting to the reproducing means through one of the filters described above.

【0006】[0006]

【作用】第1の発明では、集音手段が被験車に乗車した
乗員の耳位置に相当する条件下の車室内の音を集音し、
選択手段で複数のフィルタの中から希望する参考車に該
当する1つのフィルタを選択すると、選択されたフィル
タが集音手段で集音された音響信号を参考車の音響特性
を有する音響信号にリアルタイムで迅速に加工し、この
参考車の音響信号を再生手段が被験車に乗車した乗員の
耳位置近傍で再生する。
In the first aspect of the invention, the sound collecting means collects the sound in the vehicle compartment under the condition corresponding to the ear position of the occupant in the test vehicle,
When one filter corresponding to a desired reference vehicle is selected from the plurality of filters by the selection means, the selected filter collects the acoustic signal collected by the sound collection means in real time into an acoustic signal having the acoustic characteristics of the reference vehicle. The reproduction means reproduces the acoustic signal of the reference vehicle in the vicinity of the ear position of the occupant in the test vehicle.

【0007】第2の発明では、集音手段が被験車に乗車
した乗員の耳位置に相当する条件下の車室内の音を集音
し、抽出手段が上記集音手段で集音された音響信号を同
期成分とランダム成分とに分岐抽出し、選択手段で複数
のフィルタの中から希望する参考車に該当する1つのフ
ィルタを選択すると、選択されたフィルタが上記抽出手
段から出力される同期信号とランダム成分とのいすれか
一方の出力信号を参考車の音響特性を有する音響信号に
リアルタイムで迅速に加工し、この参考車の音響信号を
再生手段が被験車に乗車した乗員の耳位置近傍で再生す
る。
In the second invention, the sound collecting means collects the sound in the vehicle compartment under the condition corresponding to the ear position of the occupant in the test vehicle, and the extracting means collects the sound collected by the sound collecting means. When a signal is branched and extracted into a synchronous component and a random component, and one filter corresponding to a desired reference vehicle is selected from a plurality of filters by the selecting means, the selected filter outputs a synchronizing signal from the extracting means. The output signal of either the random signal or the random component is rapidly processed in real time into an acoustic signal having the acoustic characteristics of the reference vehicle, and the acoustic signal of this reference vehicle is reproduced by the reproducing means in the vicinity of the ears of the occupant riding the test vehicle. Play with.

【0008】[0008]

【実施例】以下、本発明の一実施例を図面とともに前述
の従来例と同一部分に同一符号を付して詳述する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings by attaching the same symbols to the same parts as those of the above-mentioned conventional example.

【0009】第1実施例 図1は、本発明の第1実施例を示している。図1におい
て、集音手段10は、乗員の耳位置に相当する条件下た
る被験車1の車室内の音を集音するものであって、被験
車1の助手席や後席などの乗車位置に設置されるダミー
ヘッド2と、このダミーヘッド2の左右の耳部に設置さ
れたマイクロホン3と、このマイクロホン3の出力たる
音響信号を増幅するプリアンプ4とで構成されている。
First Embodiment FIG. 1 shows a first embodiment of the present invention. In FIG. 1, the sound collecting means 10 collects the sound in the vehicle interior of the test vehicle 1 under the condition corresponding to the occupant's ear position, and the sound collection means 10 is located in the passenger seat or rear seat of the test vehicle 1. The dummy head 2 installed in the microphone, the microphones 3 installed in the left and right ears of the dummy head 2, and the preamplifier 4 that amplifies the acoustic signal output from the microphone 3.

【0010】再生手段11は、メインアンプ6と、被験
車1の運転席などの乗車位置に乗車した乗員7の左右の
耳部に装着されてメインアンプ6からの増幅された音響
信号を音に再生するヘッドホン8とで構成されている。
The reproducing means 11 is mounted on the main amplifier 6 and the left and right ears of the occupant 7 who is in the riding position such as the driver's seat of the test vehicle 1 and outputs the amplified acoustic signal from the main amplifier 6 as a sound. It is composed of headphones 8 for reproduction.

【0011】複数のフィルタ121,122,123,1
4,……,12iは、被験車1の音響特性と複数の参考
車の音響特性との比を異にしている。具体的には、被験
車1の車室内音の周波数特性をY1(ω)とし、複数の
参考車それぞれの車室内音の周波数特性Y2i(ω)と
し、被験車1での車室内音の周波数特性Y1(ω)と参
考車それぞれの車室内音の周波数特性Y2i(ω)との比
をHi(ω)とし、上記被験車1での周波数特性Y
1(ω)を有する車室内音を、参考車それぞれの周波数
特性Y2i(ω)を有する車室内音に加工するには、 Y2i(ω)=Y1(ω)×Hi(ω)……(1) の関係が成立すれば良い。したがって、上記(1)式よ
り、被験車1の車室内音の周波数特性Y1(ω)と参考
車それぞれの車室内音の周波数特性Y2i(ω)との比H
i(ω)は、 Hi(ω)=Y2i(ω)/Y1(ω)……(2) となるので、このHi(ω)を予め評価する走行条件毎
に作成し、この作成したHi(ω)を有する複数のフィ
ルタ121,122,123,124,……,12iを作
り、この作った複数のフィルタ121〜12iを、集音手
段10のプリアンプ4と再生手段11のメインアンプ6
との間の経路に設けてある。
A plurality of filters 12 1 , 12 2 , 12 3 , 1
2 4 , ..., 12 i have different ratios between the acoustic characteristics of the test vehicle 1 and the acoustic characteristics of the plurality of reference vehicles. Specifically, the frequency characteristic of the vehicle interior sound of the test vehicle 1 is set to Y 1 (ω), and the frequency characteristic of the vehicle interior sound of each of the plurality of reference vehicles is set to Y 2i (ω). The frequency characteristic Y 1 (ω) of the reference vehicle and the frequency characteristic Y 2i (ω) of the vehicle interior sound of each reference vehicle are defined as H i (ω).
To process the vehicle interior sound having 1 (ω) into the vehicle interior sound having the frequency characteristics Y 2i (ω) of each reference vehicle, Y 2i (ω) = Y 1 (ω) × H i (ω) ...... It suffices if the relationship (1) holds. Therefore, from the above formula (1), the ratio H between the frequency characteristic Y 1 (ω) of the vehicle interior sound of the test vehicle 1 and the frequency characteristic Y 2i (ω) of the vehicle interior sound of each reference vehicle is obtained.
Since i (ω) is H i (ω) = Y 2i (ω) / Y 1 (ω) (2), this H i (ω) is created for each traveling condition to be evaluated in advance, and A plurality of filters 12 1 , 12 2 , 12 3 , 12 4 , ..., 12 i having the created H i (ω) are created, and the created plurality of filters 12 1 to 12 i are stored in the sound collecting means 10. The preamplifier 4 and the main amplifier 6 of the reproducing means 11
It is provided on the route between and.

【0012】選択手段13は、複数のフィルタ121
122,123,124,……,12iの中から1つのフィ
ルタを選択し、集音手段10で集音した車室内音の音響
信号をその選択した1つのフィルタに通して再生手段1
1に出力するものであって、具体的には、1つの可動接
点131と、複数のフィルタ121,122,123,12
4,……,12iよりも1つ多い個数たる複数の固定接点
132,133,134,135,……,13i+2とからな
るスイッチになっている。可動接点131は、メインア
ンプ6の入力端に接続されている。固定接点132は、
プリアンプ4の出力端に、複数のフィルタ121,1
2,123,124,……12iを迂回するバイパス経路
14を介して接続されている。固定接点133は、プリ
アンプ4の出力端に入力端が接続されて被験車1の車室
内音の周波数特性Y1(ω)と被験車の車室内音の周波
数特性Y21(ω)との比H1(ω)を有するフィルタ1
1の出力端に接続されている。固定接点134は、プリ
アンプ4の出力端に入力端が接続されて被験車1の車室
内音の周波数特性Y1(ω)と被験車の車室内音の周波
数特性Y22(ω)との比H2(ω)を有するフィルタ1
2の出力端に接続されている。固定接点135は、プリ
アンプ4の出力端に入力端が接続されて被験車1の車室
内音の周波数特性Y1(ω)と被験車の車室内音の周波
数特性Y23(ω)との比H3(ω)を有するフィルタ1
3の出力端に接続されている。固定接点136は、プリ
アンプ4の出力端に入力端が接続されて被験車1の車室
内音の周波数特性Y1(ω)と被験車の車室内音の周波
数特性Y24(ω)との比H4(ω)を有するフィルタ1
2の出力端に接続されている。固定接点13i+2は、プ
リアンプ4の出力端に入力端が接続されて被験車1の車
室内音の周波数特性Y1(ω)と被験車の車室内音の周
波数特性Y2i(ω)との比Hi(ω)を有するフィルタ
12iの出力端に接続されている。
The selecting means 13 comprises a plurality of filters 12 1 ,
One of the filters 12 2 , 12 3 , 12 4 , ..., 12 i is selected, and the acoustic signal of the vehicle interior sound collected by the sound collecting means 10 is passed through the selected one filter to reproduce the sound. 1
Output to one, specifically, one movable contact 13 1 and a plurality of filters 12 1 , 12 2 , 12 3 , 12
4, ..., 12 is one greater than i greater number serving plurality of fixed contacts 13 2, 13 3, 13 4, 13 5, ..., has a switch consisting of 13 i + 2 Prefecture. The movable contact 13 1 is connected to the input end of the main amplifier 6. The fixed contact 13 2 is
At the output end of the preamplifier 4, a plurality of filters 12 1 , 1
2 2 , 12 3 , 12 4 , ... 12 i are connected via a bypass path 14 that bypasses. The fixed contact 13 3 has an input end connected to the output end of the preamplifier 4, and has a frequency characteristic Y 1 (ω) of the vehicle interior sound of the test vehicle 1 and a frequency characteristic Y 21 (ω) of the vehicle interior sound of the test vehicle 1 . Filter 1 with ratio H 1 (ω)
It is connected to the output of 2 1 . The fixed contact 13 4 has an input end connected to the output end of the preamplifier 4 and has a frequency characteristic Y 1 (ω) of the vehicle interior sound of the test vehicle 1 and a frequency characteristic Y 22 (ω) of the vehicle interior sound of the test vehicle 1 . Filter 1 with ratio H 2 (ω)
It is connected to the output terminal of 2 2 . The fixed contact 13 5 has an input end connected to the output end of the preamplifier 4 and has a frequency characteristic Y 1 (ω) of the vehicle interior sound of the test vehicle 1 and a frequency characteristic Y 23 (ω) of the vehicle interior sound of the test vehicle 1 . Filter 1 with ratio H 3 (ω)
It is connected to the output of 2 3 . The fixed contact 13 6 has an input end connected to the output end of the preamplifier 4, and has a frequency characteristic Y 1 (ω) of the vehicle interior sound of the test vehicle 1 and a frequency characteristic Y 24 (ω) of the vehicle interior sound of the test vehicle 1 . Filter 1 with ratio H 4 (ω)
It is connected to the output terminal of 2 2 . The fixed contact 13 i + 2 has an input end connected to the output end of the preamplifier 4 and has a frequency characteristic Y 1 (ω) of the vehicle interior sound of the test vehicle 1 and a frequency characteristic Y 2i (ω) of the vehicle interior sound of the test vehicle 1. Is connected to the output of a filter 12 i having a ratio H i (ω).

【0013】次に、第1実施例の作用を説明する。Next, the operation of the first embodiment will be described.

【0014】被験車1の助手席などの乗車位置に、左右
の耳部にマイクロホン3が装着されたダミーヘッド2を
設置し、被験車1の運転席などの乗車位置に乗車した被
検者たる乗員7の左右の耳部に、ヘッドホン8を装着す
る。そして、被験車1の図外のエンジンを駆動すると、
マイクロホン3が被験車1の走行時における車室内での
エンジン音を含む騒音を集音する。そして、スイッチ1
3の可動接点131が図1の実線示のように固定接点1
2に接続されている場合には、上記マイクロホン3で
集音した音響信号が、プリアンプ4で増幅された後、バ
イパス経路14を通ってメインアンプ6で増幅されつつ
ヘッドホン8で音に再生され、この再生音を乗員7が左
右の耳で聴取する。
A dummy head 2 having microphones 3 attached to the left and right ears is installed at a passenger seat of the test vehicle 1 and the like, and the subject is a passenger seated at the driver's seat of the test vehicle 1. Headphones 8 are attached to the left and right ears of the occupant 7. Then, when the engine (not shown) of the test vehicle 1 is driven,
The microphone 3 collects noise including engine sound inside the vehicle when the test vehicle 1 is running. And switch 1
The movable contact 13 1 of No. 3 is the fixed contact 1 as shown by the solid line in FIG.
3 when 2 is connected, an acoustic signal collected by the microphone 3 is, after being amplified by a preamplifier 4, while being amplified by the main amplifier 6 through the bypass passage 14 is reproduced in sound headphones 8 The occupant 7 hears this reproduced sound with the left and right ears.

【0015】また、スイッチ13の可動接点131が複
数の固定接点133〜13i+2のうちの1つの固定接点と
しての固定接点133に接続された場合には、上記マイ
クロホン3で集音した音響信号が、プリアンプ4で増幅
された後フィルタ121に出力される。すると、フィル
タ121が、被験車1の車室内音の周波数特性Y1(ω)
と被験車の車室内音の周波数特性Y21(ω)との比H1
(ω)を有しているので、上記プリアンプ4から入力さ
れた音響信号の周波数特性がY1(ω)からY21(ω)
に自動的に変化して、メインアンプ6に出力する。そし
て、メインアンプ6で増幅された音響信号がヘッドホン
8で音に再生され、この再生音を乗員7が左右の耳で聴
取する。即ち、乗員7は、ヘッドホン8を装着し、被験
車1を運転しながら、あるいは同乗しながら、車室内音
の周波数特性Y21(ω)を有する参考車のエンジン音の
ような音圧を有する車室内での走行音を聴取する。
When the movable contact 13 1 of the switch 13 is connected to the fixed contact 13 3 as one of the plurality of fixed contacts 13 3 to 13 i + 2 , the microphone 3 collects the fixed contact. The sounded sound signal is output to the filter 12 1 after being amplified by the preamplifier 4. Then, the filter 12 1 causes the frequency characteristic Y 1 (ω) of the vehicle interior sound of the test vehicle 1.
To the frequency characteristic Y 21 (ω) of the vehicle interior sound of the test vehicle H 1
Since (ω) is included, the frequency characteristics of the acoustic signal input from the preamplifier 4 are changed from Y 1 (ω) to Y 21 (ω).
To the main amplifier 6 automatically. Then, the acoustic signal amplified by the main amplifier 6 is reproduced as sound by the headphones 8, and the reproduced sound is heard by the occupant 7 with the left and right ears. That is, the occupant 7 wears the headphones 8 and has a sound pressure similar to the engine sound of the reference vehicle having the frequency characteristic Y 21 (ω) of the vehicle interior sound while driving the test vehicle 1 or riding in the vehicle. Listen to the running sound inside the vehicle.

【0016】要するに、この第1実施例によれば、乗員
7は、スイッチ13の可動接点131を固定接点132
接続した状態で被験車1の車室内での実際のエンジン音
を聴取する一方、スイッチ131を固定接点133〜13
i+2のうちの1つの固定接点に接続して、フィルタ121
〜12iの中から希望する参考車に該当する1つのフィ
ルタを選択することにより、被験車1の車室内での実際
のエンジン音よりも大きいエンジン音、または小さいエ
ンジン音としてリアルタイムに加工された参考車の車室
内でのエンジン音に相当するエンジン音を迅速に聴取し
て、評価することができる。
In short, according to the first embodiment, the occupant 7 listens to the actual engine sound in the passenger compartment of the test vehicle 1 with the movable contact 13 1 of the switch 13 connected to the fixed contact 13 2. On the other hand, the switch 13 1 is connected to the fixed contacts 13 3 to 13
The filter 12 1 is connected to one fixed contact of i + 2.
By selecting one filter corresponding to a desired reference vehicle from among ~ 12 i , it was processed in real time as an engine sound larger or smaller than the actual engine sound in the vehicle interior of the test vehicle 1. The engine sound corresponding to the engine sound in the passenger compartment of the reference vehicle can be quickly heard and evaluated.

【0017】第2実施例 図2は、本発明の第2実施例を示している。この第2実
施例の車室内音響特性評価装置は、第1実施例での複数
のフィルタ121〜12iを、音源側フィルタ12A1
12A2,12A3,12A4,……,12Aiと、車室内
側フィルタ12B1,12B2,12B3,12B4,…
…,12Biとに分割し、これら分割された音源側フィ
ルタ12A1〜12Aiと車室内側フィルタ12B1〜1
2Biとの組み合わせを、選択手段たるスイッチ13A
で種々選択的に形成するようにした点に特徴がある。
Second Embodiment FIG. 2 shows a second embodiment of the present invention. In the vehicle interior acoustic characteristic evaluation apparatus of the second embodiment, the plurality of filters 12 1 to 12 i of the first embodiment are replaced by the sound source side filter 12A 1 ,
12A 2 , 12A 3 , 12A 4 , ..., 12A i , and vehicle interior side filters 12B 1 , 12B 2 , 12B 3 , 12B 4 , ...
, 12B i, and these divided sound source side filters 12A 1 to 12A i and vehicle interior side filters 12B 1 to 1
The combination with 2B i is a switch 13A as a selection means.
It is characterized in that it is formed selectively in various ways.

【0018】具体的には、音源側フィルタ12A1〜1
2Aiそれぞれは、被験車1の音源としてのエンジンか
らの音(エンジン音)の周波数特性E1(ω)と、複数
の参考車の音源としてのエンジンからの音(エンジン
音)の周波数特性E2i(ω)との比を有している。この
音源側フィルタ12A1〜12Aiの入力端それぞれは、
集音手段10のプリアンプ4の出力端に並列接続されて
いる。車室内側フィルタ12B1〜12Biそれぞれは、
被験車1のエンジンからマイクロホン3まで音の伝達特
性(被験車1の伝達特性)S1(ω)と、複数の参考車
のエンジンから乗員の耳位置までの音の伝達特性(参考
車の伝達特性)S2i(ω)との比を有している。この車
室内側フィルタ12B1〜12Biの出力端それぞれは、
再生手段11のメインアンプ6の入力端に並列接続され
ている。
Specifically, the sound source side filters 12A 1 to 1
Each of 2A i has a frequency characteristic E 1 (ω) of a sound (engine sound) from the engine as a sound source of the test vehicle 1 and a frequency characteristic E of a sound (engine sound) from the engine as a sound source of a plurality of reference vehicles. It has a ratio with 2i (ω). Each of the input ends of the sound source side filters 12A 1 to 12A i is
It is connected in parallel to the output terminal of the preamplifier 4 of the sound collecting means 10. Each of the vehicle interior side filters 12B 1 to 12B i is
Transmission characteristics of sound from engine of test vehicle 1 to microphone 3 (transmission characteristics of test vehicle 1) S 1 (ω) and transmission characteristics of sound from engine of multiple reference vehicles to occupant's ear position (transmission of reference vehicle) Characteristic) It has a ratio with S 2i (ω). The output terminals of the vehicle interior side filters 12B 1 to 12B i are
It is connected in parallel to the input terminal of the main amplifier 6 of the reproducing means 11.

【0019】また、音源側フィルタ12A1〜12Ai
の出力端それぞれと車室内側フィルタ12B1〜12Bi
の入力端それぞれとは、選択手段なるスイッチ13Aの
固定接点13A31,13A32,13A41,13A42,1
3A51,13A52,13A61,13A62,……,13A
i+21,13Ai+22に個別に接続されている。このスイッ
チ13Aの固定接点13A21,13A22それぞれには、
プリアンプ4の出力端に接続されたバイパス経路141
とメインアンプ6の入力端に接続されたバイパス経路1
2とが個別に接続されている。このスイッチ13Aの
図外の可動接点は、固定接点13A21,13A21,13
31,13A41,13A51,13A61,……,13A
i+21それぞれを、固定接点13A22,13A32,13A
42,13A52,13A62,……,13Ai+22のそれぞれ
に個別に切り替え接続することができるようになってい
る。
Further, the sound source side filters 12A1 to 12Ai
Output terminal respectively cabin side filter 12B of 1 ~12B i
The respective input ends of the switches are fixed contacts 13A 31 , 13A 32 , 13A 41 , 13A 42 , 1 of the switch 13A serving as a selection means.
3A 51 , 13A 52 , 13A 61 , 13A 62 , ..., 13A
i + 21 and 13A i + 22 are individually connected. Each of the fixed contacts 13A 21 and 13A 22 of the switch 13A is
Bypass path 14 1 connected to the output terminal of the preamplifier 4
And bypass path 1 connected to the input of main amplifier 6
4 2 and 4 2 are individually connected. The movable contacts (not shown) of the switch 13A are fixed contacts 13A 21 , 13A 21 , 13
A 31 , 13A 41 , 13A 51 , 13A 61 , ..., 13A
i + 21 to fixed contacts 13A 22 , 13A 32 , 13A
42 , 13A 52 , 13A 62 , ..., 13A i + 22 can be individually switched and connected.

【0020】そして、スイッチ13Aの可動接点の働き
により、固定接点13A31,13A41,13A51,13
61,……13Ai+21それぞれを、固定接点13A32
13A42,13A52,13A62,……13Ai+22のそれ
ぞれに個別に切り替え接続することにより、被験車1で
の車室内音の周波数特性Y1(ω)と参考車それぞれの
車室内音の周波数特性Y2i(ω)との比をHi(ω)
は、 Hi(ω)=Y2i(ω)/Y1(ω) =(E2i(ω)×S2i(ω))/((E1(ω)×S1(ω))…(3) となる。
The movable contact of the switch 13A causes the fixed contacts 13A 31 , 13A 41 , 13A 51 , 13 to be fixed.
A 61 , ... 13A i + 21 , fixed contacts 13A 32 ,
13A 42 , 13A 52 , 13A 62 , ... 13A i + 22 are individually switched and connected, so that the frequency characteristic Y 1 (ω) of the vehicle interior sound in the test vehicle 1 and the vehicle interior sound of each reference vehicle To the frequency characteristic Y 2i (ω) of H i (ω)
Is H i (ω) = Y 2i (ω) / Y 1 (ω) = (E 2i (ω) × S 2i (ω)) / ((E 1 (ω) × S 1 (ω)) ... ( 3)

【0021】したがって、この第2実施例によれば、ス
イッチ13Aの固定接点の切り替え操作により、被験車
1の乗車位置に乗車した乗員7が、被験車1を含む複数
の音の種類と被験車1を含む複数の車体の種類との組み
合わせられた別々の音を迅速に聴取して、評価すること
ができる。このことは、例えば、被験車1に別の車種の
エンジンを搭載した場合に、被験車1の車室内での走行
音がどのようになるかを予測したり、被験車1のエンジ
ンを別の車種の車に搭載した場合に、別の車種の車の車
室内での走行音がどのようになるかを予測したりするこ
とができる。つまり、音源と車体との音響特性を分けて
評価することができる。
Therefore, according to the second embodiment, the occupant 7 who is in the riding position of the test vehicle 1 by the switching operation of the fixed contact of the switch 13A causes the occupant 7 including the test vehicle 1 to select a plurality of types of sounds and the test vehicle. Different sounds combined with multiple body types, including 1, can be quickly heard and evaluated. This means that, for example, when the test vehicle 1 is equipped with an engine of a different vehicle type, the running sound of the test vehicle 1 in the passenger compartment is predicted, and the engine of the test vehicle 1 is changed to another one. When mounted on a vehicle of a vehicle type, it is possible to predict what the running sound of a vehicle of another vehicle type will be in the passenger compartment. That is, the acoustic characteristics of the sound source and the vehicle body can be separately evaluated.

【0022】なお、前記第1,第2実施例における各フ
ィルタ121〜12iまたは12A1〜12Aiは、振幅の
みを変化させるものでも音響評価を十分に行えるが、位
相特性まで含めれば、評価精度が一層高まる。この位相
特性まで含める場合には、各フィルタ121〜12iまた
は12A1〜12Aiにディジタルフィルタを用いるとと
もに、各フィルタ121〜12iまたは12A1〜12Ai
の因果性が保てるように、適当な遅延を与えると良い。
[0022] Incidentally, the first, the filters 12 1 to 12 i or 12A 1 ~12A i in the second embodiment is performed only be enough acoustic evaluation by those varying amplitude, if you include up phase characteristics, Evaluation accuracy is further enhanced. When included until the phase characteristic, with use of digital filters with each filter 12 1 to 12 i or 12A 1 ~12A i, each filter 12 1 to 12 i or 12A 1 ~12A i
It is good to give an appropriate delay so that the causality of

【0023】第3実施例 図3は、第3実施例の車室内音響特性評価装置に使用す
る被験車の音響特性と複数の被験車の音響特性との比を
測定するための実験装置を示している。この図3に示す
実験装置は、被験車1でのダミーヘッド2のマイクロホ
ン3で集音される音響信号には、主に、エンジンの回転
に同期した同期成分と、ロードノイズなどのランダム成
分とが含まれているので、マイクロホン3で集音しかつ
プリアンプ4で増幅した音響信号の同期成分をLMSア
ルゴリズム20を用いた適応形ディジタルフィルタ21
で抽出し、マイクロホン3で集音した音響信号のランダ
ム成分を遅延回路22で抽出し、これら同期成分とラン
ダム成分との差をとった出力端23の出力が最小となる
ようにLMSアルゴリズム20で適用形ディジタルフィ
ルタ21を常に更新する。これにより、マイクロホン3
で集音した音響信号は適用形ディジタルフィルタ21を
通った出力端24では同期成分だけが出力されるので、
この出力端24を周波数分析器25で被験車1と複数の
参考車それぞれについて周波数分析する。そして、この
周波数分析の結果により、一定車速における被験車1の
車室内音の次数成分Y1(ω)と複数の参考車の車室内
音の次数成分Y2i(ω)との比Hi(ω)を求める。つ
まり、一定車速における被験車1での次数成分Y
1(ω)を有する車室内音を、参考車それぞれの次数成
分Y2i(ω)を有する車室内音に加工するには、 Y2i(ω)=Y1(ω)×Hi(ω)……(4) の関係が成立すれば良い。したがって、上記(4)式よ
り、被験車1の車室内音の周波数特性Y1(ω)と参考
車それぞれの車室内音の周波数特性Y2i(ω)との比H
i(ω)は、 Hi(ω)=Y2i(ω)/Y1(ω)……(5) となるので、このHi(ω)を予め評価する走行条件毎
に作成し、この作成したHi(ω)を有する図4に示す
複数のフィルタ121,122,123,124,……,1
iを作れば良い。
Third Embodiment FIG. 3 shows an experimental apparatus for measuring the ratio between the acoustic characteristics of a test vehicle and the acoustic characteristics of a plurality of test vehicles used in the vehicle interior acoustic characteristic evaluation apparatus of the third embodiment. ing. In the experimental apparatus shown in FIG. 3, the acoustic signal collected by the microphone 3 of the dummy head 2 in the test vehicle 1 mainly includes a synchronization component synchronized with the rotation of the engine and a random component such as road noise. , The synchronous component of the acoustic signal collected by the microphone 3 and amplified by the preamplifier 4 is applied to the adaptive digital filter 21 using the LMS algorithm 20.
And the random component of the acoustic signal picked up by the microphone 3 is extracted by the delay circuit 22, and the LMS algorithm 20 uses the LMS algorithm 20 so as to minimize the output of the output terminal 23 which is the difference between the synchronous component and the random component. The adaptive digital filter 21 is constantly updated. This allows the microphone 3
As for the acoustic signal collected in, only the synchronization component is output at the output end 24 after passing through the adaptive digital filter 21,
The output terminal 24 is frequency-analyzed by the frequency analyzer 25 for each of the test vehicle 1 and the plurality of reference vehicles. Then, the results of this frequency analysis, the ratio H i of the order component Y 1 in the vehicle interior sound subject vehicle 1 at a constant speed (omega) and a plurality of order components Y 2i reference vehicle cabin sound (omega) ( ω). That is, the order component Y in the test vehicle 1 at a constant vehicle speed
To process the vehicle interior sound having 1 (ω) into the vehicle interior sound having the order components Y 2i (ω) of each reference vehicle, Y 2i (ω) = Y 1 (ω) × H i (ω) It suffices if the relationship of (4) is established. Therefore, from the above formula (4), the ratio H between the frequency characteristic Y 1 (ω) of the vehicle interior sound of the test vehicle 1 and the frequency characteristic Y 2i (ω) of the vehicle interior sound of each reference vehicle is obtained.
Since i (ω) is H i (ω) = Y 2i (ω) / Y 1 (ω) (5), this H i (ω) is created for each traveling condition to be evaluated in advance, and The plurality of filters 12 1 , 12 2 , 12 3 , 12 4 , ..., 1 shown in FIG. 4 having the created H i (ω)
Make 2 i .

【0024】図4は第3実施例の車室内音響特性評価装
置を示している。この第3実施例の音響評価装置は、図
3の実験装置と同様なLMSアルゴリズム20を用いた
適用形ディジタルフィルタ21と遅延回路22と図3の
実験装置を使用して求めた被験車1の音響特性と複数の
参考車の音響特性との比Hi(ω)を有する複数のフィ
ルタ12C1,12C2,12C3,……,12Ciを作
り、この複数のフィルタ12C1〜12Ciそれぞれの入
力端を適用形ディジタルフィルタ20の出力端24側に
並列接続してある。この複数のフィルタ12C1〜12
iの出力端それぞれには選択手段としてのスイッチ1
3Bの複数の固定接点13B2,13B3,13B4,…
…,13Bi+1を個別に接続してある。このスイッチ1
3Bの可動接点13B1には、スイッチ26の一方の固
定接点262を接続してある。このスイッチ26の他方
の固定接点263は適用形ディジタルフィルタ20と遅
延回路21との入力端に接続してある。このスイッチ2
6の可動接点は、再生手段11のメインアンプ6の入力
端に接続してある。また、適用形ィジタルフィルタ20
の出力と遅延回路21の出力との差をとった出力端23
側にはスイッチ27を介してスイッチ13Bの可動接続
13B1とスイッチ26の一方の固定接点262との結合
点に接続してある。
FIG. 4 shows a vehicle interior acoustic characteristic evaluation apparatus according to the third embodiment. The acoustic evaluation apparatus of the third embodiment is an adaptive digital filter 21 using the LMS algorithm 20 similar to the experimental apparatus shown in FIG. 3, a delay circuit 22, and the experimental apparatus shown in FIG. a plurality of filters 12C 1 with a ratio H i (ω) of the acoustic characteristics of the acoustic characteristics and a plurality of reference vehicles, 12C 2, 12C 3, ...... , created a 12C i, 1 ~12C i each the plurality of filters 12C Is connected in parallel to the output terminal 24 side of the adaptive digital filter 20. The plurality of filters 12C 1 to 12
A switch 1 as a selection means is provided at each output terminal of C i.
3B fixed contacts 13B 2 , 13B 3 , 13B 4 , ...
..., 13B i + 1 are individually connected. This switch 1
One fixed contact 26 2 of the switch 26 is connected to the movable contact 13B 1 of 3B. The other fixed contact 26 3 of the switch 26 is connected to the input terminals of the adaptive digital filter 20 and the delay circuit 21. This switch 2
The movable contact 6 is connected to the input end of the main amplifier 6 of the reproducing means 11. In addition, the adaptive digital filter 20
Of the output of the delay circuit 21 and the output of the delay circuit 21
On the side, a switch 27 is connected to the connection point between the movable connection 13B 1 of the switch 13B and one fixed contact 26 2 of the switch 26.

【0025】この第3実施例によれば、被験車1の助手
席などの乗車位置に、左右の耳部にマイクロホン3が装
着されたダミーヘッド2を設置し、被験車1の運転席な
どの乗車位置に乗車した被検者たる乗員7の左右の耳部
に、ヘッドホン8を装着し、被験車1の図外のエンジン
を駆動し、スイッチ26の可動接点261を固定接点2
3に接続すると、マイクロホン3が被験車1の走行時
における車室内でのエンジン音を含む走行音を集音し、
このマイクロホン3で集音した音響信号が、プリアンプ
4で増幅された後、バイパス経路14Cを通ってメイン
アンプ6で増幅されつつヘッドホン8で走行音に再生さ
れ、この再生音を乗員7が左右の耳で聴取する。
According to the third embodiment, the dummy head 2 having the microphones 3 mounted on the left and right ears is installed at the passenger seat position of the test vehicle 1 and the driver seat of the test vehicle 1 is installed. Headphones 8 are attached to the left and right ears of the occupant 7 who is in the riding position, the engine (not shown) of the test vehicle 1 is driven, and the movable contact 26 1 of the switch 26 is fixed to the fixed contact 2
When connected to 6 3 , the microphone 3 collects the running sound including the engine sound inside the vehicle when the test vehicle 1 is running,
The acoustic signal picked up by the microphone 3 is amplified by the preamplifier 4, then is amplified by the main amplifier 6 through the bypass path 14C and reproduced as running sound by the headphones 8. The reproduced sound is reproduced by the occupant 7 to the left and right. Listen with your ears.

【0026】また、スイッチ27をオフ動作し、スイッ
チ26の可動接点261を図4の実線示のように一方の
固定接点262に接続し、スイッチ13Bの可動接点1
3B1が複数の固定接点13B2〜13Biのうちの1つ
の固定接点としての固定接点13B2に接続された場合
には、上記マイクロホン3で集音した音響信号の同期成
分の音響特性Y1(ω)が、フィルタ12C1で参考車の
音響特性Y21(ω)に自動的に変化して、メインアンプ
6に出力する。そして、メインアンプ6で増幅された音
響信号がヘッドホン8で音に再生され、この再生音を乗
員7が左右の耳で聴取する。即ち、乗員7は、ヘッドホ
ン8を装着し、被験車1を運転しながら、あるいは同乗
しながら、音響特性Y21(ω)を有する参考車のエンジ
ン音の同期成分のような音圧を有する車室内での音を聴
取する。
Further, the switch 27 is turned off, the movable contact 26 1 of the switch 26 is connected to one fixed contact 26 2 as shown by the solid line in FIG. 4, and the movable contact 1 of the switch 13B is connected.
3B 1 when is connected to the fixed contact 13B 2 as one fixed contact of the plurality of fixed contacts 13B 2 13 b i is the acoustic characteristics of the synchronizing component of the acoustic signals collected by the microphone 3 Y 1 (Ω) is automatically changed to the acoustic characteristic Y 21 (ω) of the reference vehicle by the filter 12C 1 and output to the main amplifier 6. Then, the acoustic signal amplified by the main amplifier 6 is reproduced as sound by the headphones 8, and the reproduced sound is heard by the occupant 7 with the left and right ears. That is, the vehicle occupant 7 wearing the headphones 8 and driving or riding in the test vehicle 1 has a sound pressure such as a synchronous component of the engine sound of the reference vehicle having the acoustic characteristic Y 21 (ω). Listen to the sound in the room.

【0027】また、スイッチ26の可動接点261を図
4の実線示のように一方の固定接点262に接続し、ス
イッチ13Bの可動接点13B1を複数の固定接点13
1〜13Bi以外の図外の遊び固定接点に接続して、ス
イッチ13Bをオフ動作し、スイッチ27がオン動作さ
れた場合には、乗員7が、上記マイクロホン3で集音し
た音響信号のロードノイズなどのランダム成分の再生音
を聴取する。
The movable contact 26 1 of the switch 26 is connected to one fixed contact 26 2 as shown by the solid line in FIG. 4, and the movable contact 13B 1 of the switch 13B is connected to the plurality of fixed contacts 13.
When the switch 13B is turned off and the switch 27 is turned on by connecting to a fixed play contact (not shown ) other than B 1 to 13B i , the occupant 7 outputs the acoustic signal collected by the microphone 3. Listen to the playback sound of random components such as road noise.

【0028】なお、図4において、複数のフィルタ12
1〜12Ciとスイッチ13Bとを出力端23側に接続
し、スイッチ27を出力端24側に接続するように、複
数のフィルタ12C1〜12Ciとスイッチ13Bとスイ
ッチ27との配置を入れ換えることにより、マイクロホ
ン3で集音した音響信号のランダム成分を、音響特性Y
2i(ω)を有する参考車のランダム成分の音として聴取
することができる。この場合には、図3に示す実験装置
の出力端23側に周波数分析器25を接続し、この周波
数分析器25による分析結果により、複数のフィルタ1
2C1〜12Ciの被験車1の音響特性Y1(ω)と参考
車の音響特性Y2i(ω)との比Hi(ω)をランダム成
分について設定することは勿論である。
In FIG. 4, a plurality of filters 12 are provided.
The arrangement of the plurality of filters 12C 1 to 12C i , the switch 13B and the switch 27 is interchanged so that the C 1 to 12C i and the switch 13B are connected to the output end 23 side and the switch 27 is connected to the output end 24 side. As a result, the random component of the acoustic signal collected by the microphone 3 is converted into the acoustic characteristic Y.
It can be heard as a random component sound of a reference vehicle having 2i (ω). In this case, a frequency analyzer 25 is connected to the output end 23 side of the experimental apparatus shown in FIG.
It goes without saying that the ratio H i (ω) between the acoustic characteristics Y 1 (ω) of the test vehicle 1 of 2C 1 to 12C i and the acoustic characteristics Y 2i (ω) of the reference vehicle is set for the random component.

【0029】要するに、この第3実施例によれば、乗員
7は、スイッチ13Bとスイッチ26とスイッチ27と
の切り替え操作により、一定車速における被験車1の車
室内での実際の走行音と参考車に該当するエンジン音と
参考車に該当するランダム成分音それぞれにリアルタイ
ムに加工された種々の音を迅速に聴取して、評価するこ
とができる。
In short, according to the third embodiment, the occupant 7 performs the switching operation of the switch 13B, the switch 26, and the switch 27 so that the actual traveling sound and the reference vehicle of the test vehicle 1 at a constant vehicle speed. It is possible to quickly listen to and evaluate various sounds processed in real time for the engine sound corresponding to the above and the random component sound corresponding to the reference vehicle.

【0030】第4実施例 図5は第4実施例を示している。この第4実施例の車室
内音響特性評価装置は、図3の実験装置で得た分析結果
としての図6に示すエンジンの回転数とエンジン音の次
数成分との関係を表すデータを記憶した外部信号手段2
8を第3実施例での車室内音響評価装置の遅延回路22
の入力端に接続し、この外部信号手段28がエンジン回
転数センサ29からの出力信号たるエンジン回転数信号
に対応するエンジン音の次数成分データを遅延回路22
に出力しながら被験車1での車室内音を参考車での車室
内音に加工して評価できるようにした点に特徴がある。
Fourth Embodiment FIG. 5 shows a fourth embodiment. The vehicle interior acoustic characteristic evaluation apparatus of the fourth embodiment stores data representing the relationship between the engine speed and the order component of the engine sound shown in FIG. 6 as the analysis result obtained by the experimental apparatus of FIG. Signal means 2
8 is a delay circuit 22 of the vehicle interior acoustic evaluation apparatus according to the third embodiment.
The external signal means 28 is connected to the input terminal of the engine speed sensor 29 to output the order component data of the engine sound corresponding to the engine speed signal output from the engine speed sensor 29 to the delay circuit 22.
The feature is that the vehicle interior sound of the test vehicle 1 is processed into the vehicle interior sound of the reference vehicle for evaluation while being output.

【0031】したがって、この第4実施例によれば、加
速時における被験車1の車室内音の次数成分をN
1(n)とし、加速時における複数の参考車それぞれの
車室内音の次数成分をN2i(n)とし、加速時における
被験車1での車室内音の次数成分N1(n)と参考車そ
れぞれの車室内音の次数成分N2i(n)との比をH
i(n)とし、上記被験車1での次数成分N1(n)を有
する車室内音を、参考車それぞれの次数成分N2i(n)
を有する車室内音に加工するには、 N2i(n)=N1(n)×Hi(n)……(6) の関係が成立すれば良い。したがって、上記(6)式よ
り、被験車1の車室内音の次数成分N1(n)と参考車
それぞれの車室内音の次数成分N2i(n)との比H
i(n)は、 Hi(n)=N2i(n)/N1(n)……(7) となるので、このHi(n)を予め評価する走行条件毎
に作成し、この作成したHi(n)を有する複数のフィ
ルタ121,122,123,124,……,12iを作る
ことにより、外部信号手段28からの指示による希望す
る参考車における加速中の走行音を評価することができ
る。
Therefore, according to the fourth embodiment, the order component of the vehicle interior sound of the test vehicle 1 during acceleration is N
1 (n), the order component of the vehicle interior sound of each of the plurality of reference vehicles during acceleration is N 2i (n), and the order component N 1 (n) of the vehicle interior sound of the test vehicle 1 during acceleration is used as a reference. The ratio of the vehicle interior sound of each vehicle to the order component N 2i (n) is H
i (n), the vehicle interior sound having the order component N 1 (n) in the test vehicle 1 is defined as the order component N 2i (n) of each reference vehicle.
In order to process the vehicle interior sound having the following, the relationship of N 2i (n) = N 1 (n) × H i (n) (6) should be established. Therefore, from the above equation (6), the ratio H between the order component N 1 (n) of the vehicle interior sound of the test vehicle 1 and the order components N 2i (n) of the vehicle interior sounds of the reference vehicles, respectively.
Since i (n) is H i (n) = N 2i (n) / N 1 (n) (7), this H i (n) is created for each traveling condition to be evaluated in advance, and By making a plurality of filters 12 1 , 12 2 , 12 3 , 12 4 , ..., 12 i having the created H i (n), the acceleration during acceleration in the desired reference vehicle according to the instruction from the external signal means 28 is performed. The running sound can be evaluated.

【0032】[0032]

【発明の効果】以上のように本発明によれば、乗員の耳
位置に相当する条件下の車室内の音を集音し、この集音
した音響信号を希望する参考車の音響信号に変更した
後、乗員の耳位置近傍で再生するので、被験車の車室内
の音を複数の参考車の音響信号に相当する音にリアルタ
イムで加工しながら評価することができ、音以外の加速
度感等の体感要素と車室内の走行音との整合性を詳細に
検討することができる。
As described above, according to the present invention, the sound in the vehicle compartment under the condition corresponding to the occupant's ear position is collected and the collected sound signal is changed to the sound signal of the desired reference vehicle. After that, since it is reproduced near the ears of the occupant, it is possible to evaluate the sound in the vehicle interior of the test vehicle while processing it in real time into sounds equivalent to the acoustic signals of multiple reference vehicles. It is possible to examine in detail the consistency between the bodily sensation element and the running sound in the vehicle interior.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の第1実施例を示す構成図。FIG. 1 is a configuration diagram showing a first embodiment of the present invention.

【図2】本発明の第2実施例を示す構成図。FIG. 2 is a configuration diagram showing a second embodiment of the present invention.

【図3】本発明の第3実施例に使用する実験装置を示す
構成図。
FIG. 3 is a configuration diagram showing an experimental device used in a third embodiment of the present invention.

【図4】本発明の第3実施例を示す構成図。FIG. 4 is a configuration diagram showing a third embodiment of the present invention.

【図5】本発明の第4実施例を示す構成図。FIG. 5 is a configuration diagram showing a fourth embodiment of the present invention.

【図6】第4実施例の参考車のエンジン回転数とエンジ
ン音との関係を示す特性図。
FIG. 6 is a characteristic diagram showing a relationship between engine speed and engine sound of a reference vehicle of the fourth embodiment.

【図7】従来の車室内音響特性評価装置を搭載した車両
の斜視図。
FIG. 7 is a perspective view of a vehicle equipped with a conventional vehicle interior acoustic characteristic evaluation device.

【符号の説明】[Explanation of symbols]

1…被験車 2…ダミーヘッド 3…マイクロホン 7…乗員 8…ヘッドホン 10…集音手段 11…再生手段 121〜12i,12A1〜12Ai,12B1〜12Bi
12C1〜12Ci…フィルタ 13,13A,13B,…スイッチ(選択手段) 20…LMSアルゴリズム(抽出手段) 21…適応形ディジタルフィルタ(抽出手段) 22…遅延回路(抽出手段) 28…外部信号手段
1 ... Test Car 2 ... dummy head 3 ... microphone 7 ... passenger 8 ... headphone 10 ... sound collecting means 11 ... playback means 12 1 ~12 i, 12A 1 ~12A i, 12B 1 ~12B i,
12C 1 to 12C i ... Filter 13, 13A, 13B, ... Switch (selecting means) 20 ... LMS algorithm (extracting means) 21 ... Adaptive digital filter (extracting means) 22 ... Delay circuit (extracting means) 28 ... External signal means

フロントページの続き (72)発明者 木下 明生 神奈川県横浜市神奈川区宝町2番地 日産 自動車株式会社内Front page continuation (72) Inventor Akio Kinoshita 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 被験車に乗車した乗員の耳位置に相当す
る条件下に設置された集音手段と、 前記被験車に乗車した乗員の耳位置近傍に設置された再
生手段と、 前記被験車の音響特性と複数の参考車の音響特性との比
を有する複数のフィルタと、 この複数のフィルタの中から1つのフィルタを選択し、
前記集音手段で集音した音響信号をその選択した1つの
フィルタを通して前記前記再生手段に出力する選択手段
と、 を備えたことを特徴とする車室内音響特性評価装置。
1. A sound collecting unit installed under a condition corresponding to an ear position of an occupant in a test vehicle, a reproducing unit installed near an ear position of an occupant in the test vehicle, and the test vehicle. And a plurality of filters having a ratio of the acoustic characteristics of the reference vehicle to the acoustic characteristics of a plurality of reference vehicles, and one filter is selected from the plurality of filters,
A vehicle interior acoustic characteristic evaluation apparatus comprising: a selection unit configured to output the sound signal collected by the sound collection unit to the reproduction unit through the selected one filter.
【請求項2】 被験車に乗車した乗員の耳位置に相当す
る条件下に設置された集音手段と、 前記被験車に乗車した乗員の耳位置近傍に設置された再
生手段と、 前記集音手段で集音した音響信号を入力し、この入力信
号を音源と同期する同期成分とそれ以外のランダム成分
とに分岐抽出する抽出手段と、 前記被験車の音響特性と複数の参考車の音響特性との比
を有する複数のフィルタと、 この複数のフィルタの中から1つのフィルタを選択し、
前記抽出手段から出力される同期成分とランダム成分と
のいずれか一方の出力信号をその選択した1つのフィル
タを通して前記前記再生手段に出力する選択手段と、 を備えたことを特徴とする車室内音響特性評価装置。
2. A sound collecting unit installed under a condition corresponding to an ear position of an occupant in a test vehicle, a reproducing unit installed near an ear position of an occupant in the test vehicle, and the sound collecting unit. Inputting the acoustic signal collected by the means, extracting means for branching and extracting the input signal into a synchronous component that synchronizes with the sound source and other random components, acoustic characteristics of the test vehicle and acoustic characteristics of a plurality of reference vehicles A plurality of filters having a ratio of and a filter selected from the plurality of filters,
And a selecting unit that outputs the output signal of either the synchronous component or the random component output from the extracting unit to the reproducing unit through the selected one filter. Characteristic evaluation device.
JP31610891A 1991-11-29 1991-11-29 Cabin acoustic characteristic evaluating device Pending JPH05147481A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31610891A JPH05147481A (en) 1991-11-29 1991-11-29 Cabin acoustic characteristic evaluating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31610891A JPH05147481A (en) 1991-11-29 1991-11-29 Cabin acoustic characteristic evaluating device

Publications (1)

Publication Number Publication Date
JPH05147481A true JPH05147481A (en) 1993-06-15

Family

ID=18073338

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31610891A Pending JPH05147481A (en) 1991-11-29 1991-11-29 Cabin acoustic characteristic evaluating device

Country Status (1)

Country Link
JP (1) JPH05147481A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004053435A1 (en) * 2002-12-11 2004-06-24 Daimlerchrysler Ag Device, method and headphones for registering and reproducing noises, in particular for analysing acoustic components in motor vehicles
JP2020014041A (en) * 2018-07-13 2020-01-23 株式会社荏原製作所 Signal processing device, signal processing system, and search method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004053435A1 (en) * 2002-12-11 2004-06-24 Daimlerchrysler Ag Device, method and headphones for registering and reproducing noises, in particular for analysing acoustic components in motor vehicles
JP2020014041A (en) * 2018-07-13 2020-01-23 株式会社荏原製作所 Signal processing device, signal processing system, and search method

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