JPS5899950U - noise suppression device - Google Patents

noise suppression device

Info

Publication number
JPS5899950U
JPS5899950U JP19363181U JP19363181U JPS5899950U JP S5899950 U JPS5899950 U JP S5899950U JP 19363181 U JP19363181 U JP 19363181U JP 19363181 U JP19363181 U JP 19363181U JP S5899950 U JPS5899950 U JP S5899950U
Authority
JP
Japan
Prior art keywords
noise
noise suppression
suppression device
monitoring circuit
communication line
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
JP19363181U
Other languages
Japanese (ja)
Inventor
幸男 田中
秋山　昌文
Original Assignee
日本電信電話株式会社
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 日本電信電話株式会社 filed Critical 日本電信電話株式会社
Priority to JP19363181U priority Critical patent/JPS5899950U/en
Publication of JPS5899950U publication Critical patent/JPS5899950U/en
Pending legal-status Critical Current

Links

Landscapes

  • Noise Elimination (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はＰＭ無線回線の雑音周波数特性を示す図、第２
図はＰＭ無線回線に周波数反転秘話を採用した場合の雑
音及び音声のスペクトラムを示す図、第３図はこの考案
の実施例を示した図である。 １１．１３：高電界時の特性、１２．１４：低電界時の
特性、１５：音声スペクトラム、２１：入力端子、２２
．　２６：切替えスイッチ、２４：高域減衰フィルタ、
２５：雑音監視回路、２７：受話器、２８．２９：フィ
ルタ２４による減衰領域。Figure 1 is a diagram showing the noise frequency characteristics of the PM radio line, Figure 2
The figure shows the spectrum of noise and voice when frequency inversion secret speech is adopted in a PM radio line, and FIG. 3 is a diagram showing an embodiment of this invention. 11.13: Characteristics at high electric field, 12.14: Characteristics at low electric field, 15: Audio spectrum, 21: Input terminal, 22
．． 26: Selector switch, 24: High frequency attenuation filter,
25: Noise monitoring circuit, 27: Receiver, 28.29: Attenuation area by filter 24.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 雑音の重畳されている通信回線において雑音量を検出す
る雑音監視回路と、その雑音監視回路で所定量以上の雑
音が検出されると、前記通信回線よりの受信信号からそ
の雑音周波数成分の多い帯域を減衰する制御手段とを具
備する雑音抑圧装置。A noise monitoring circuit detects the amount of noise in a communication line on which noise is superimposed, and when the noise monitoring circuit detects a predetermined amount or more of noise, it detects a band with many noise frequency components from the received signal from the communication line. and a control means for attenuating the noise.
JP19363181U 1981-12-26 1981-12-26 noise suppression device Pending JPS5899950U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19363181U JPS5899950U (en) 1981-12-26 1981-12-26 noise suppression device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19363181U JPS5899950U (en) 1981-12-26 1981-12-26 noise suppression device

Publications (1)

Publication Number Publication Date
JPS5899950U true JPS5899950U (en) 1983-07-07

Family

ID=30106980

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19363181U Pending JPS5899950U (en) 1981-12-26 1981-12-26 noise suppression device

Country Status (1)

Country Link
JP (1) JPS5899950U (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52127140A (en) * 1976-04-19 1977-10-25 Matsushita Electric Ind Co Ltd Receiver
JPS52127115A (en) * 1976-04-19 1977-10-25 Matsushita Electric Ind Co Ltd Receiver

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52127140A (en) * 1976-04-19 1977-10-25 Matsushita Electric Ind Co Ltd Receiver
JPS52127115A (en) * 1976-04-19 1977-10-25 Matsushita Electric Ind Co Ltd Receiver

Similar Documents

Publication Publication Date Title
US3927376A (en) Speaker muting system
JPS5899950U (en) noise suppression device
JPH06140949A (en) Noise reduction device
JPS6037959U (en) transceiver
JPS609342U (en) wireless receiving device
JPS5933345U (en) transceiver
JPS61265930A (en) Radio transmission and reception equipment
JPS6090958U (en) Telephone with audio equipment
JPS5857110U (en) Low frequency characteristic improvement circuit
JPS593685U (en) Microphone sensitivity switching circuit
JPS586460U (en) Full-duplex voice response device
JPS5961637U (en) Noise prevention device for mobile communication
JPS5816943U (en) Squelch circuit in radio equipment
JPS63532U (en)
JPS58106919A (en) Noise reducing circuit in fm tuner
JPS5816942U (en) Squelch circuit in radio equipment
JPS6035656U (en) transceiver
JPS60163850U (en) Transmitting/receiving device
JPH04168812A (en) Radio communication equipment
JPS60158343U (en) squelch circuit
JPS6019257U (en) automatic adjustment device
JPS6074325U (en) telephone
JPS58147320U (en) Audio circuit with frequency characteristic correction circuit
JPS6249319U (en)
JPS61109223U (en)