JPH0339947U - - Google Patents
Info
- Publication number
- JPH0339947U JPH0339947U JP9989289U JP9989289U JPH0339947U JP H0339947 U JPH0339947 U JP H0339947U JP 9989289 U JP9989289 U JP 9989289U JP 9989289 U JP9989289 U JP 9989289U JP H0339947 U JPH0339947 U JP H0339947U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- control signal
- response
- amplifier
- outputs
- 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
- 238000001514 detection method Methods 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 1
Description
第１図は、この考案の実施例による呼出音量自
動調節機能を内蔵した電話機の外観図である。第
２図は、第１図の電話機に使用されるこの考案の
音量自動調整回路のブロツク図である。第３図は
、この考案の実施例に従つた音量自動調整回路の
周囲騒音及び快適受話音量に対する受話音量特性
である。
図において、１０は電話機、１２はプツシユボ
タン、１４はマイクロホン（検出手段）、１６は
スライドスイツチ、１８はボリユーム、２０はリ
ンガ（音発生手段）、２４，３２は増幅器、２６
はＡ／Ｄコンバータ、２８はＣＰＵ（制御手段）
、３０は発振器である。なお、図中同一符号は同
一、または相当部分を示す。
FIG. 1 is an external view of a telephone equipped with an automatic ring volume adjustment function according to an embodiment of the present invention. FIG. 2 is a block diagram of the automatic volume adjustment circuit of this invention used in the telephone of FIG. 1. FIG. 3 shows the listening volume characteristics of the automatic volume adjustment circuit according to the embodiment of this invention with respect to ambient noise and comfortable listening volume. In the figure, 10 is a telephone, 12 is a push button, 14 is a microphone (detection means), 16 is a slide switch, 18 is a volume, 20 is a ringer (sound generation means), 24 and 32 are amplifiers, and 26
is the A/D converter, 28 is the CPU (control means)
, 30 is an oscillator. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
波数に相当する電気信号に変換する検出手段と、
発振周波数制御信号に応答して所定の周波数の信
号を発生する発振回路と、前記検出手段から出力
された電気信号に応答して、利得制御信号及び前
記制御信号を出力する制御手段と、前記利得制御
信号に応答して振幅が制御される信号を出力する
増幅器と、前記増幅器から出力された前記信号を
振動音に変換する音発生手段を具備したことを特
徴とする音量自動調整回路。 detection means for detecting ambient noise and converting it into an electrical signal corresponding to the noise level or noise frequency;
an oscillation circuit that generates a signal at a predetermined frequency in response to an oscillation frequency control signal; a control device that outputs a gain control signal and the control signal in response to the electrical signal output from the detection device; An automatic volume adjustment circuit comprising: an amplifier that outputs a signal whose amplitude is controlled in response to a control signal; and a sound generation means that converts the signal output from the amplifier into vibration sound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9989289U JPH0339947U (en) | 1989-08-29 | 1989-08-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9989289U JPH0339947U (en) | 1989-08-29 | 1989-08-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0339947U true JPH0339947U (en) | 1991-04-17 |
Family
ID=31648924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9989289U Pending JPH0339947U (en) | 1989-08-29 | 1989-08-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0339947U (en) |
-
1989
- 1989-08-29 JP JP9989289U patent/JPH0339947U/ja active Pending