JPH02231899A - Receiver - Google Patents
ReceiverInfo
- Publication number
- JPH02231899A JPH02231899A JP1052148A JP5214889A JPH02231899A JP H02231899 A JPH02231899 A JP H02231899A JP 1052148 A JP1052148 A JP 1052148A JP 5214889 A JP5214889 A JP 5214889A JP H02231899 A JPH02231899 A JP H02231899A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- speaker unit
- unit
- amplifier circuit
- microphone unit
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 abstract 4
- 238000010586 diagram Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 210000005069 ears Anatomy 0.000 description 2
- XEOCKQIQXJNTER-UHFFFAOYSA-N gold palladium platinum Chemical group [Pd].[Pd].[Pd].[Pd].[Pd].[Pt].[Pt].[Pt].[Pt].[Pt].[Pt].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au].[Au] XEOCKQIQXJNTER-UHFFFAOYSA-N 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Circuit For Audible Band Transducer (AREA)
Abstract
Description
【発明の詳細な説明】
A 産業上の利用分野
本発明は、公衆電話や自動車電話等の電話機に設けられ
る受話器に関する。DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a handset installed in a telephone such as a public telephone or a car telephone.
B 発明の概要
本発明は、公衆電話や自動車電話等の電話機に設けられ
る受話器において、スピーカユニットとマイクロホンユ
ニットを受話口近傍に設け、上記マイクロホンユニット
にて上記受話口近傍の音響信号を電気信号に変換し、上
記スピーカユニットに電気信号として供給される入力受
話信号を増幅する増幅回路の入力端に、上記マイクロホ
ンユニットにて得られる電気信号を帰還回路を介して負
帰還させることにより、外部騒音を減少させて、上記ス
ピーカユニットによる音響出力のS/Nを高め、通話相
手の音声を明瞭に受聴できるようにしたものである。B. Summary of the Invention The present invention provides a receiver installed in a telephone such as a public telephone or a car phone, in which a speaker unit and a microphone unit are provided near the earpiece, and the microphone unit converts an acoustic signal near the earpiece into an electrical signal. The electrical signal obtained by the microphone unit is negatively fed back via a feedback circuit to the input end of an amplifier circuit that converts and amplifies the input reception signal that is supplied as an electrical signal to the speaker unit, thereby reducing external noise. This increases the S/N ratio of the acoustic output from the speaker unit, making it possible to clearly hear the voice of the other party.
C 従来の技術
一般に、電話機のハンドセットは、電気信号として供給
される入力受話信号を音啓出力に変換するマイクロボン
ユニットを受話口に設けた受話器と、送話口に送話音を
電気信号に変換するマイクロホンユニットを設けた送話
器にて構成されている。従来、街頭の公衆電話や自動車
電話など騒音レベルの高い状況で使用される電話機では
、通常の電話機と同様なハンドセットが用いられており
、受話器の音響出力レヘルを可変できるようにした電話
機も提供されている。C. Prior Art In general, a telephone handset includes a receiver equipped with a microbond unit in the earpiece that converts an input received signal supplied as an electrical signal into an audio output, and a receiver equipped with a microbond unit in the earpiece that converts the transmitted voice signal into an electrical signal. It consists of a transmitter equipped with a microphone unit for conversion. Traditionally, telephones used in situations with high noise levels, such as public telephones on the street and car telephones, have used handsets similar to those of ordinary telephones, and telephones with variable receiver sound output levels have also been provided. ing.
D 発明が解決しようとする課題
ところで、街頭の公衆電話や自動車電話など騒音レヘル
の高い状況で使用される電話機では、使用の耳に周囲の
騒音が到達するので、通話相手の音声が開き取り難く、
受話器の音響出力レヘルを高めるだけで、通話相手の音
声を明瞭に受聴できるようにすることは極め゛ζ困難で
あった。D. Problem to be solved by the invention By the way, with telephones used in situations with high noise levels, such as public telephones on the street and car telephones, ambient noise reaches the ears of the user, making it difficult to hear the voice of the person on the other end of the line. ,
It is extremely difficult to be able to clearly hear the voice of the person on the other end of the line simply by increasing the acoustic output level of the handset.
そこで、本発明は、」二述の如き従来の電話機における
問題点に鑑み、騨音レヘルの高い環境下においても使用
可能な例えば電話機を実現することを目的とし、使用者
の耳に到達する外部騒音を滅少さ廿て、受話音のS/N
比を高め、通話相手の音声を明瞭に受聴できるようにし
た新規な構成の受話器を提供するものである。SUMMARY OF THE INVENTION In view of the problems with conventional telephones as mentioned above, the present invention aims to realize, for example, a telephone that can be used even in an environment with high noise levels, and is designed to Minimize noise and improve S/N of receiving sound
To provide a telephone receiver with a new configuration that increases the communication ratio and allows the voice of the other party to be heard clearly.
E 課題を解決するための手段
本発明に係る受話器は、上述の目的を達成するために、
電気信号として供給される入力受話信号を音響信号に変
換して出力する伝達関数がHのスピーカユニッ1・と、
上記スピーカユニットに供給する入力受話信号を増幅す
る伝達関数がAの増幅回路と、受話口近傍の音宮信号を
電気信号に変換する伝達関数がMのマイクロホンユニッ
1・と、上記マイクロボンユニットにて得られる信号を
上記増幅回路の入力端に負帰還さ・ける伝達関数がβの
帰還回路とを備え、上記増幅回路、スピーカユニソ1〜
、マイクロホンユニッ1・および帰還回路の各伝達関数
をIAHMβ1 》1 の範囲に設定するとともに、上
記スピーカユニットとマイクロホンユニシトを受話口近
傍に設けたことを特徴としている。E. Means for Solving the Problems In order to achieve the above-mentioned objects, the handset according to the present invention has the following features:
a speaker unit 1 with a transfer function of H that converts an input reception signal supplied as an electrical signal into an acoustic signal and outputs it;
an amplifier circuit having a transfer function A for amplifying an input reception signal supplied to the speaker unit; a microphone unit 1 having a transfer function M converting a sound signal near the earpiece into an electrical signal; and a feedback circuit with a transfer function of β which provides negative feedback to the input terminal of the amplifier circuit, and the amplifier circuit, the speaker unit 1 to
, the microphone unit 1, and the feedback circuit are set in the range of IAHMβ1 >>1, and the speaker unit and microphone unit are provided near the earpiece.
F作用
本発明に係る受話器では、スピーカユニソトを設けた受
話口近傍における外部騒音を含む音響信号がマイクロホ
ンユニットムごて電気信号に変換し、上記スピーカユニ
ッ1・に電気信号として供給される入力受話信号を増幅
する増幅回路の入力端に、上記マイクロホンユニットに
て得られる電気信号が帰還回路を介して負帰還される。F action In the handset according to the present invention, an acoustic signal including external noise near the earpiece provided with the speaker unit is converted into an electrical signal by the microphone unit, and input is supplied as an electrical signal to the speaker unit 1. An electrical signal obtained by the microphone unit is negatively fed back via a feedback circuit to an input end of an amplifier circuit that amplifies a received signal.
」二記増幅回路、スピーカユニット、マイクロホンユニ
ットおよび帰還回路の各伝達関数をIAHMβ1 》】
の範囲に設定することにより、上記受話口近傍の音響
信号は、外部からの雑音の信号レヘルかi/AHMβに
低減される。The transfer functions of the amplifier circuit, speaker unit, microphone unit, and feedback circuit are expressed as IAHMβ1》]
By setting in the range of , the acoustic signal near the earpiece is reduced to the signal level of external noise i/AHMβ.
G 実施例
以下、本発明に係る受話器の一実施例について図面に従
い詳細に説明する。G. Embodiment Hereinafter, an embodiment of the telephone receiver according to the present invention will be described in detail with reference to the drawings.
第1図に示す実施例は、第2図に示すようにグリップ(
1)の両端部分に受話口(2)と送話口(3)が設けら
れた電話機のハンドセット(4)に本発明を適用したも
ので、本発明に係る受話器(10)を構成するスピーカ
ユニッI−(14)とマイクロホンユニッ} (16)
が上記グリップ(1)の上端側の受話口(2)部分に設
けられている。The embodiment shown in FIG. 1 has a grip (
The present invention is applied to a telephone handset (4) in which an earpiece (2) and a mouthpiece (3) are provided at both ends of the speaker unit (10) according to the present invention. I-(14) and microphone unit} (16)
is provided at the earpiece (2) on the upper end side of the grip (1).
上記受話器(10)は、その原理的な構成を第1図に示
してあるように、上記ハンドセット(4)の受話口(2
)部分にスピーカユニット(14)とマイクロホンユニ
ット(16)を設けるとともに、信号入力端子(11)
に与えられる電気信号として与えられる人力受話信号S
を増幅して」二記スピーカユニッ1・(14)に供給す
る増幅回路(13)の入力側に信号合成器(12)を設
け、上記受話口(2)近傍の音響信号を」二記マイクロ
ホンユニント(16)にて電気信号に変換して帰還回路
(l7)を介して上記信号合成器(12)に供給し、上
記信号合成器(12)にて入力受話信号Sに上記帰還回
路(17)の出力ずなわら帰還信号を合成して上記増幅
回路(13)に供給し、上記増幅回路(13)の負帰還
制御を行う構成となっている。The handset (10) has an earpiece (2) of the handset (4), whose basic configuration is shown in FIG.
) is provided with a speaker unit (14) and a microphone unit (16), as well as a signal input terminal (11).
A human reception signal S given as an electrical signal given to
A signal synthesizer (12) is provided on the input side of the amplifier circuit (13) which amplifies the sound signal and supplies it to the speaker unit 1 (14), and the acoustic signal near the earpiece (2) is output to the microphone. The unit (16) converts it into an electrical signal and supplies it to the signal synthesizer (12) via the feedback circuit (l7), and the signal synthesizer (12) converts the input reception signal S to the feedback circuit (17). 17) are combined and supplied to the amplifier circuit (13) to perform negative feedback control of the amplifier circuit (13).
上記増幅回路(13)、スピーカユニット(14)マイ
クロホンユニッl−(16)および上記帰還回路(17
)のの各特性を周波数領域で示す各伝達関数は、上記増
幅回路(13)の伝達関数A、上記スピーカユニット(
14)の伝達関数I]、上記マイクロホンユニット(1
6)の伝達関数Mおよび上記帰還回路(17)の伝達関
数βが1AI]Mβl)1 の条件を満足する範囲で
設定されている。The amplifier circuit (13), the speaker unit (14), the microphone unit (16) and the feedback circuit (17)
) in the frequency domain are the transfer function A of the amplifier circuit (13), the speaker unit (
14) transfer function I], the microphone unit (1
The transfer function M of 6) and the transfer function β of the feedback circuit (17) are set within a range that satisfies the following condition: 1AI]Mβl)1.
この受話器(10)は、第3図の等価ブロック構成図に
示すように、上記スピーカユニソト(14)による音響
出力信号に、上記受話口(2)の近傍の音響空間におい
て等価的な信号加算器(15)にて外部からの雑音信号
Nが加算され、この信号加算器(15)による合成出力
が上記マイクロホンユニット(16)にて電気信号に変
換されて上記帰還回路(17)を介して上記信号合成器
(12)に供給される。As shown in the equivalent block diagram of FIG. 3, this receiver (10) adds an equivalent signal in the acoustic space near the earpiece (2) to the acoustic output signal from the speaker unit (14). The noise signal N from the outside is added in the adder (15), and the combined output from the signal adder (15) is converted into an electrical signal by the microphone unit (16) and sent through the feedback circuit (17). The signal is supplied to the signal combiner (12).
この受話器(10)の使用者の耳(20)の入口に当た
る信号出力端子(19)には、上記信号入力端子(11
)にすれば良い。The signal output terminal (19) corresponding to the entrance of the ear (20) of the user of this handset (10) is connected to the signal input terminal (11).
).
に与えられる入力受話信号の信号レベルをSとし、信号
入力端子(18)に与えられる外部からの雑音信号の信
号レヘルNとすると、上記信号加算器(15)による合
成出力として
なる音圧レベルPの音響出力、すなわち、上記入力受話
信号Sに1/Mβの変換特性が与えられて周波数特性や
歪み等が補正されるとともに、外部からの雑音の信号レ
ベルNが1/AHMβに低減されたS/N比の大きな明
瞭な受話音声が得られる。Suppose that the signal level of the input reception signal applied to the signal input terminal (18) is S, and the signal level N of the external noise signal applied to the signal input terminal (18) is the sound pressure level P that is the synthesized output from the signal adder (15). That is, the input reception signal S is given a conversion characteristic of 1/Mβ to correct frequency characteristics, distortion, etc., and the signal level N of external noise is reduced to 1/AHMβ. A clear received voice with a large /N ratio can be obtained.
従って、この受話器(10)では、周囲の騒音レヘルの
高い環境下においても、使用者の耳(20)に入力され
る外部騒音を減少させて、上記スピーカユニット(14
)による音響出力のS/N比を高め、通話相手の音声を
明瞭に受聴することができる。Therefore, in this handset (10), even in an environment with a high ambient noise level, the external noise input to the user's ears (20) is reduced, and the speaker unit (14)
), it is possible to increase the S/N ratio of the acoustic output and hear the voice of the other party clearly.
なお、上記信号出力端子(19)に得られる音響出力の
音量を調整するには、上記信号入力端子(11)の前段
すなわち音源側に音量調整器を設けるようすることがで
きる。Incidentally, in order to adjust the volume of the acoustic output obtained at the signal output terminal (19), a volume adjuster may be provided at a stage before the signal input terminal (11), that is, on the sound source side.
H 発明の効果
本発明に係る受話器では、スピーカユニ・ントを設けた
受話口近傍における外部騒音を含む音響信号をマイクロ
ボンユニットにて電気信号に変換し、上記スピーカユニ
ットに電気信号として供給される入力受話信号を増幅す
る増幅回路の入力端に、上記マイクロホンユニットにて
得られる電気信号を帰還回路を介して負帰還するととも
に、上記増幅回路、スピーカユニット、マイクロホンユ
ニ・ントおよび帰還回路の各伝達関数をIAHMβ》1
の範囲に設定することにより、上記受話口近傍における
外部からの雑音の信号レヘルが1/A H Mβに低減
される。H. Effects of the Invention In the handset according to the present invention, an acoustic signal including external noise near the earpiece provided with the speaker unit is converted into an electrical signal by the microbon unit, and the signal is supplied as an electrical signal to the speaker unit. The electrical signal obtained by the microphone unit is negatively fed back to the input end of the amplifier circuit that amplifies the input reception signal via the feedback circuit, and the signal is transmitted to the amplifier circuit, the speaker unit, the microphone unit, and the feedback circuit. Function IAHMβ》1
By setting in the range of , the signal level of external noise near the earpiece is reduced to 1/A H Mβ.
従って、本発明によれば、周囲の騒音レヘルの高い環境
下においても、使用者の耳(20)に入力される外部騒
音を凍少させて、上記スピーカユニ・ン1・による音響
出力のS/N比を高め、通話相手の音声を明瞭に受聴す
ることのできる受話器を提供Therefore, according to the present invention, even in an environment with a high ambient noise level, the external noise input to the user's ear (20) can be frozen, and the sound output from the speaker unit 1 can be Providing a handset that increases the /N ratio and allows you to clearly hear the voice of the other party.
第1図は本発明に係る受話器の原理的な構成を示す模式
図、第2回は本発明を適用した電話機のハンドセットの
外観斜視図、第3図は上記受話器の等価ブロック構成図
である。
(2)・・・・・・・・・・
(4)・・・・・・・・・・
(10)・・・・・・・・・・
(11)・・・・・・・・・・
(12)・・・・・・・・・・
(13)・・・・・・・・・・
(14)・・・・・・・・・・
(17)・・・・・・・・・・
(16)・・・・・・・・・・
受話ロ
ハンドセット
受話器
信号入力端子
信号合成器
増幅回路
ヘッドホンユニット
帰還回路
マイクロホンユニットFIG. 1 is a schematic diagram showing the basic structure of a handset according to the present invention, Part 2 is an external perspective view of a telephone handset to which the present invention is applied, and FIG. 3 is an equivalent block diagram of the handset. (2)・・・・・・・・・・・・ (4)・・・・・・・・・・ (10)・・・・・・・・・・ (11)・・・・・・・・・・・・ (12)・・・・・・・・・ (13)・・・・・・・・・・ (14)・・・・・・・・・・ (17)・・・・・・...... (16) ...... Handset Receiver Signal input terminal Signal synthesizer Amplifier circuit Headphone unit Feedback circuit Microphone unit
Claims (1)
換して出力する伝達関数がHのスピーカユニットと、上
記スピーカユニットに供給する入力受話信号を増幅する
伝達関数がAの増幅回路と、受話口近傍の音響信号を電
気信号に変換する伝達関数がMのマイクロホンユニット
と、上記マイクロホンユニットにて得られる信号を上記
増幅回路の入力端に負帰還させる伝達関数がβの帰還回
路とを備え、 上記増幅回路、スピーカユニット、マイクロホンユニッ
トおよび帰還回路の各伝達関数を |AHMβ|≫1 の範囲に設定するとともに、 上記スピーカユニットとマイクロホンユニットを受話口
近傍に設けたことを特徴とする受話器。[Scope of Claims] A speaker unit having a transfer function H that converts an input reception signal supplied as an electrical signal into an acoustic signal and outputting it, and a transfer function A that amplifies the input reception signal supplied to the speaker unit. an amplifier circuit, a microphone unit with a transfer function M that converts an acoustic signal near the earpiece into an electrical signal, and a feedback circuit with a transfer function β that negatively feeds the signal obtained by the microphone unit to the input end of the amplifier circuit. circuit, each transfer function of the amplifier circuit, the speaker unit, the microphone unit, and the feedback circuit is set in the range of |AHMβ|≫1, and the speaker unit and the microphone unit are provided near the earpiece. A telephone receiver.
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5214889A JP2821611B2 (en) | 1989-03-06 | 1989-03-06 | Handset |
US07/482,250 US5091954A (en) | 1989-03-01 | 1990-02-20 | Noise reducing receiver device |
EP94112894A EP0629995A1 (en) | 1989-03-01 | 1990-02-27 | Noise reducing receiver device |
EP90302057A EP0385713B1 (en) | 1989-03-01 | 1990-02-27 | Noise reducing receiver device |
KR1019900002508A KR0129766B1 (en) | 1989-03-01 | 1990-02-27 | Noise redviding receiver device |
DE69023366T DE69023366T2 (en) | 1989-03-01 | 1990-02-27 | Receiving device for reducing noise. |
MYPI90000320A MY106871A (en) | 1989-03-01 | 1990-03-01 | Noise reducing receiver device. |
HK98106790A HK1007618A1 (en) | 1989-03-01 | 1998-06-25 | Noise reducing receiver device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5214889A JP2821611B2 (en) | 1989-03-06 | 1989-03-06 | Handset |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02231899A true JPH02231899A (en) | 1990-09-13 |
JP2821611B2 JP2821611B2 (en) | 1998-11-05 |
Family
ID=12906789
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5214889A Expired - Lifetime JP2821611B2 (en) | 1989-03-01 | 1989-03-06 | Handset |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2821611B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008244852A (en) * | 2007-03-27 | 2008-10-09 | Sony Corp | Sound reproduction device and sound reproduction method |
-
1989
- 1989-03-06 JP JP5214889A patent/JP2821611B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008244852A (en) * | 2007-03-27 | 2008-10-09 | Sony Corp | Sound reproduction device and sound reproduction method |
US8265297B2 (en) | 2007-03-27 | 2012-09-11 | Sony Corporation | Sound reproducing device and sound reproduction method for echo cancelling and noise reduction |
Also Published As
Publication number | Publication date |
---|---|
JP2821611B2 (en) | 1998-11-05 |
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