JPH04328940A - Cordless telephone set with interphone function - Google Patents
Cordless telephone set with interphone functionInfo
- Publication number
- JPH04328940A JPH04328940A JP12507791A JP12507791A JPH04328940A JP H04328940 A JPH04328940 A JP H04328940A JP 12507791 A JP12507791 A JP 12507791A JP 12507791 A JP12507791 A JP 12507791A JP H04328940 A JPH04328940 A JP H04328940A
- Authority
- JP
- Japan
- Prior art keywords
- speaker
- microphone
- input
- cordless telephone
- pass filter
- 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
Links
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Landscapes
- Telephone Set Structure (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、電話回線に接続した本
体部と、移動式通話機とを無線で接続したコードレス電
話機に関し、詳しくはスピーカとマイクとを同一筐体内
に収納したインターホン機能付き本体部に関するもので
ある。[Industrial Application Field] The present invention relates to a cordless telephone in which a main unit connected to a telephone line and a mobile telephone are wirelessly connected, and more specifically, it has an intercom function in which a speaker and a microphone are housed in the same housing. This relates to the main body.
【０００２】0002
【従来の技術】コードレス電話機は、電話回線に接続し
た本体部と、移動式通話機との間を無線で繋いだもので
、例えば通話機に入力した音声を本体部に無線で送信し
、更に電話回線に送って通話する。上記コードレス電話
機において、近年、図４に示すように、同じ筐体（１）
内にスピーカ（２）とマイク（３）を収納し、通話機（
図示せず）との間で通話できるようにしたインターホン
機能付きの本体部（Ａ）が知られてきている。[Prior Art] A cordless telephone is a device in which a main unit connected to a telephone line and a mobile telephone are connected wirelessly.For example, the voice input into the telephone is wirelessly transmitted to the main unit, and Send it to the phone line and make a call. In recent years, as shown in FIG.
The speaker (2) and microphone (3) are housed inside, and the telephone (
A main body (A) with an intercom function that allows communication with a person (not shown) is becoming known.
【０００３】0003
【発明が解決しようとする課題】解決しようとする課題
は、本体部（Ａ）の同じ筐体（１）内において収納に係
るスピーカ（２）とマイク（３）とは互いに近接してお
り、且つ、図３（ｂ）（ｃ）に示すように、フラットな
周波数特性を持つため、図３（ａ）の（Ｆｂ）に示す周
波数特性を持つ音声がそのままスピーカ（２）から出て
マイク（３）に側音として入って通話を妨害する点であ
る。測定によれば、側音の周波数特性は、図３（ａ）に
示す点線曲線（Ｆａ）のように入力音声レベルに近似し
た大きなレベルとなる。（スピーカとマイクの位置関係
が特に近接する場合、入力音声より大きなレベルとなる
場合もある。）[Problems to be Solved by the Invention] The problem to be solved is that the speaker (2) and the microphone (3) that are housed in the same housing (1) of the main body (A) are close to each other; In addition, as shown in FIGS. 3(b) and 3(c), since it has a flat frequency characteristic, the sound having the frequency characteristic shown in (Fb) in FIG. 3(a) is directly output from the speaker (2) and is transmitted to the microphone ( 3) It enters as sidetone and interferes with calls. According to the measurements, the frequency characteristics of the sidetone have a high level similar to the input voice level, as shown by the dotted line curve (Fa) shown in FIG. 3(a). (If the speaker and microphone are particularly close to each other, the level may be higher than the input audio.)
【０００４】0004
【課題を解決するための手段】本発明は、電話回線に接
続されると共に、スピーカとマイクとを同一筐体内に収
納したインターホン機能付きコードレス電話機本体部に
おいて、上記スピーカ入力側に接続したスピーカ増幅器
の入力に高域濾波器を接続し、スピーカ出力の高音を強
調すると共に、マイク出力側に低域濾波器を介してマイ
ク増幅器入力を接続し、マイク入力の低音を強調するよ
うにしたことを特徴とする。[Means for Solving the Problems] The present invention provides a main body of a cordless telephone with an intercom function that is connected to a telephone line and has a speaker and a microphone housed in the same housing, and a speaker amplifier connected to the speaker input side. A high-pass filter is connected to the input of the speaker to emphasize the high-pitched sounds of the speaker output, and a microphone amplifier input is connected to the microphone output side via a low-pass filter to emphasize the low-pitched sounds of the microphone input. Features.
【０００５】[0005]
【作用】上記技術的手段によれば、スピーカより送る音
声の高音を強調すると共に、マイクに拾う音声は低音を
強調する。[Operation] According to the above technical means, the high tones of the sound transmitted from the speaker are emphasized, and the low tones of the sound picked up by the microphone are emphasized.
【０００６】[0006]
【実施例】本発明の実施例を図１乃至図３を参照して以
下に説明する。まず図１において（２）（３）はそれぞ
れインターホン機能付きコードレス電話機本体部におけ
るスピーカとマイク、（４）はスピーカ（２）の入力に
接続したスピーカ増幅器、（５）はスピーカ増幅器（４
）の入力に接続した高域濾波器、（６）はマイク（３）
の出力に接続した低域濾波器、（７）は低域濾波器（６
）の出力に接続したマイク増幅器である。Embodiments An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. First, in Figure 1, (2) and (3) are the speaker and microphone in the main body of the cordless telephone with intercom function, (4) is the speaker amplifier connected to the input of speaker (2), and (5) is the speaker amplifier (4).
) high-pass filter connected to the input of (6) is the microphone (3)
A low pass filter (7) connected to the output of the low pass filter (6
) is a microphone amplifier connected to the output of the
【０００７】上記構成に基づき本発明の動作を次に説明
する。まずマイク（３）は高音の周囲騒音を拾い易いと
共に、低音域で了解度が高くなる特性を持つ。そのため
、低域濾波器（６）を挿入することにより、図３（ｄ）
に示すように、マイク（３）の入力の周波数特性におい
て高音を抑制して周囲騒音を遮断すると共に、低音を強
調して了解度を高める。次に、スピーカ（２）はその低
音出力が筐体（１）を振動させてマイク（３）に騒音と
して伝わると共に、高音域で了解度が高くなる特性を持
つ。そのため、高域濾波器（５）を挿入することにより
、図３（ｅ）に示すように、スピーカ（２）の出力の周
波数特性において低音を抑制して筐体（１）の振動を防
止すると共に、高音を強調して了解度を高める。
そこで、図３（ｆ）に示すように、側音の周波数特性は
マイク（３）及びスピーカ（２）の各周波数特性の合成
領域（図の斜線部分）となる。測定によれば、上記合成
領域は図３（ａ）において曲線（Ｆｃ）のようになり、
入力される音声特性（Ｆｂ）よりも大きく低下して側音
特性が大幅に改善される。The operation of the present invention will be explained below based on the above configuration. First, the microphone (3) has the characteristic of easily picking up high-pitched ambient noise and increasing intelligibility in the low-frequency range. Therefore, by inserting a low-pass filter (6), Fig. 3(d)
As shown in FIG. 2, in the frequency characteristics of the input of the microphone (3), high-pitched sounds are suppressed to block ambient noise, and low-pitched sounds are emphasized to improve intelligibility. Next, the speaker (2) has the characteristic that its low-pitched sound output vibrates the housing (1) and is transmitted to the microphone (3) as noise, and that intelligibility increases in the high-pitched range. Therefore, by inserting a high-pass filter (5), as shown in FIG. 3(e), the bass is suppressed in the frequency characteristics of the output of the speaker (2) and vibration of the housing (1) is prevented. At the same time, high-pitched sounds are emphasized to improve intelligibility. Therefore, as shown in FIG. 3(f), the frequency characteristic of the sidetone becomes a composite region (shaded area in the figure) of the frequency characteristics of the microphone (3) and the speaker (2). According to the measurement, the above-mentioned synthesis region looks like a curve (Fc) in FIG. 3(a),
The sidetone characteristics are greatly improved by significantly lowering than the input voice characteristics (Fb).
【０００８】尚、本発明に係る上記本体部の総括的構成
を図２に示すと、コンデンサ（Ｃａ）（Ｃｂ）がそれぞ
れ高域及び低域濾波器（５）（７）に対応する。FIG. 2 shows the general structure of the main body according to the present invention. Capacitors (Ca) and (Cb) correspond to high-pass and low-pass filters (5) and (7), respectively.
【０００９】[0009]
【発明の効果】本発明によれば、スピーカとマイクを同
一筐体内に収納したインターホン機能付きコードレス電
話機本体部において、スピーカ出力の高音を強調すると
共に、マイク入力の低音を強調したから、側音の周波数
特性が大幅に改善され、通話妨害を防止する。Effects of the Invention According to the present invention, in the main body of a cordless telephone with an intercom function in which a speaker and a microphone are housed in the same housing, the treble of the speaker output is emphasized, and the low tone of the microphone input is emphasized. frequency characteristics have been significantly improved to prevent call interference.
【図１】本発明に係るインターホン機能付きコードレス
電話機の実施例を示す本体部のブロック図である。FIG. 1 is a block diagram of a main body showing an embodiment of a cordless telephone with an intercom function according to the present invention.
【図２】本発明に係るインターホン機能付きコードレス
電話機の実施例を示す本体部の総括的構成のブロック図
である。FIG. 2 is a block diagram of the general configuration of a main body showing an embodiment of the cordless telephone with intercom function according to the present invention.
【図３】（ａ）は入力音声と従来の側音と本考案に係る
側音との各周波数特性を示すグラフである。
（ｂ）は従来のインターホン機能付きコードレス電話機
本体部におけるスピーカ出力の周波数特性を示すグラフ
である。
（ｃ）は従来のインターホン機能付きコードレス電話機
本体部におけるマイク入力の周波数特性を示すグラフで
ある。
（ｄ）は本発明に係るインターホン機能付きコードレス
電話機本体部におけるマイク入力の周波数特性を示すグ
ラフである。
（ｅ）は本発明に係るインターホン機能付きコードレス
電話機本体部におけるスピーカ出力の周波数特性を示す
グラフである。
（ｆ）は本発明に係るインターホン機能付きコードレス
電話機本体部における側音の周波数特性を示すグラフで
ある。FIG. 3(a) is a graph showing frequency characteristics of an input voice, a conventional sidetone, and a sidetone according to the present invention. (b) is a graph showing the frequency characteristics of the speaker output in the main body of a conventional cordless telephone with an intercom function. (c) is a graph showing the frequency characteristics of microphone input in the main body of a conventional cordless telephone with an intercom function. (d) is a graph showing the frequency characteristics of the microphone input in the main body of the cordless telephone with intercom function according to the present invention. (e) is a graph showing the frequency characteristics of the speaker output in the main body of the cordless telephone with intercom function according to the present invention. (f) is a graph showing the frequency characteristics of sidetone in the main body of the cordless telephone with intercom function according to the present invention.
【図４】インターホン機能付きコードレス電話機本体部
の平面図である。FIG. 4 is a plan view of the main body of the cordless telephone with intercom function.
２ スピーカ ３ マイク ４ スピーカ増幅器 ５ 高域濾波器 ６ 低域濾波器 ７ マイク増幅器 2 Speaker 3. Microphone 4 Speaker amplifier 5 High-pass filter 6 Low-pass filter 7. Microphone amplifier
Claims (1)
カとマイクとを同一筐体内に収納したインターホン機能
付きコードレス電話機本体部において上記スピーカ入力
側に接続したスピーカ増幅器の入力に高域濾波器を接続
し、スピーカ出力の高音を強調すると共に、マイク出力
側に低域濾波器を介してマイク増幅器入力を接続し、マ
イク入力の低音を強調するようにしたことを特徴とする
インターホン機能付きコードレス電話機。Claim 1: A high-pass filter is connected to the input of a speaker amplifier connected to the speaker input side in the main body of a cordless telephone with an intercom function that is connected to a telephone line and has a speaker and a microphone housed in the same housing. This cordless telephone with an intercom function is characterized in that the high-pitched sound of the speaker output is emphasized, and the microphone amplifier input is connected to the microphone output side via a low-pass filter to emphasize the low-pitched sound of the microphone input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12507791A JPH04328940A (en) | 1991-04-26 | 1991-04-26 | Cordless telephone set with interphone function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12507791A JPH04328940A (en) | 1991-04-26 | 1991-04-26 | Cordless telephone set with interphone function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04328940A true JPH04328940A (en) | 1992-11-17 |
Family
ID=14901262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12507791A Pending JPH04328940A (en) | 1991-04-26 | 1991-04-26 | Cordless telephone set with interphone function |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04328940A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009302841A (en) * | 2008-06-12 | 2009-12-24 | Nec Corp | Voice communication apparatus, and method for controlling transmission frequency characteristics used for the voice communication apparatus |
| JP2014003502A (en) * | 2012-06-19 | 2014-01-09 | Toshiba Corp | Signal processing device and signal processing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63294018A (en) * | 1987-05-27 | 1988-11-30 | Oki Electric Ind Co Ltd | Loud-speaker telephone set |
-
1991
- 1991-04-26 JP JP12507791A patent/JPH04328940A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63294018A (en) * | 1987-05-27 | 1988-11-30 | Oki Electric Ind Co Ltd | Loud-speaker telephone set |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009302841A (en) * | 2008-06-12 | 2009-12-24 | Nec Corp | Voice communication apparatus, and method for controlling transmission frequency characteristics used for the voice communication apparatus |
| JP2014003502A (en) * | 2012-06-19 | 2014-01-09 | Toshiba Corp | Signal processing device and signal processing method |
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