IT1154316B - Perfezionemento nei sistemi telefonici con altoparlanti - Google Patents

Perfezionemento nei sistemi telefonici con altoparlanti

Info

Publication number
IT1154316B
IT1154316B IT49018/82A IT4901882A IT1154316B IT 1154316 B IT1154316 B IT 1154316B IT 49018/82 A IT49018/82 A IT 49018/82A IT 4901882 A IT4901882 A IT 4901882A IT 1154316 B IT1154316 B IT 1154316B
Authority
IT
Italy
Prior art keywords
loud
microphones
speakers
hands
telephone system
Prior art date
Application number
IT49018/82A
Other languages
English (en)
Other versions
IT8249018A0 (it
Inventor
Alfred Magnus Hestad
Levi L Rose
Original Assignee
United Networks Inc
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 United Networks Inc filed Critical United Networks Inc
Priority to IT49018/82A priority Critical patent/IT1154316B/it
Publication of IT8249018A0 publication Critical patent/IT8249018A0/it
Application granted granted Critical
Publication of IT1154316B publication Critical patent/IT1154316B/it

Links

Landscapes

  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
IT49018/82A 1982-08-23 1982-08-23 Perfezionemento nei sistemi telefonici con altoparlanti IT1154316B (it)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IT49018/82A IT1154316B (it) 1982-08-23 1982-08-23 Perfezionemento nei sistemi telefonici con altoparlanti

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT49018/82A IT1154316B (it) 1982-08-23 1982-08-23 Perfezionemento nei sistemi telefonici con altoparlanti

Publications (2)

Publication Number Publication Date
IT8249018A0 IT8249018A0 (it) 1982-08-23
IT1154316B true IT1154316B (it) 1987-01-21

Family

ID=11269400

Family Applications (1)

Application Number Title Priority Date Filing Date
IT49018/82A IT1154316B (it) 1982-08-23 1982-08-23 Perfezionemento nei sistemi telefonici con altoparlanti

Country Status (1)

Country Link
IT (1) IT1154316B (it)

Also Published As

Publication number Publication date
IT8249018A0 (it) 1982-08-23

Similar Documents

Publication Publication Date Title
CA2072299A1 (en) Adaptive speakerphone system
GB1387074A (en) Loudspeaking telephone sets
JPS56152395A (en) Ear microphone of simultaneous transmitting and receiving type
CA2048650A1 (en) Speakerphone for cellular telephones with howl prevention, detection, elimination and determination
MY119217A (en) Method and apparatus for adaptive volume control for a radiotelephone
CA2151492A1 (en) Voice interface board for use in an operator system
EP0129208A3 (en) Handsfree circuit for telephone instrument
FI64730C (fi) Foerfarande vid en talstyrd hoegtalartelefonapparat
IT1154316B (it) Perfezionemento nei sistemi telefonici con altoparlanti
JPS57134717A (en) Remote control system for mobile body
ES2127235T3 (es) Procedimiento para mejorar la atenuacion del retorno acustico de sistemas electroacusticos.
ES2000559A6 (es) Procedimiento y dispositivo para la supresion del acoplamiento acustico en instalaciones electroacusticas
GB1444828A (it)
JPS5735457A (en) Loudspeaker telephone set system
JPS56106494A (en) Method and device for howling prevention of loudspeaker
JPS5468102A (en) Sound reinforcement system
JPS61195054A (ja) 拡声電話機の音声スイツチ回路
AU7819587A (en) Improvements in call devices
KR830001578B1 (ko) 확성 전화기의 2선식 동시통화 방법
JPH0218617Y2 (it)
JPS57142063A (en) Audio switch circuit
JPS61195055A (ja) 拡声電話機の音声スイツチ回路
JPH0530161A (ja) 呼出音量自動調整機能付電話機
FR2339301A1 (fr) Methode de regulation automatique de niveau pour systeme de reproduction sonore a haut-parleur
JPS59230355A (ja) ハンドフリ−通話装置