CS219491A3 - Combined acoustic system for telephone hand-sets - Google Patents

Combined acoustic system for telephone hand-sets

Info

Publication number
CS219491A3
CS219491A3 CS912194A CS219491A CS219491A3 CS 219491 A3 CS219491 A3 CS 219491A3 CS 912194 A CS912194 A CS 912194A CS 219491 A CS219491 A CS 219491A CS 219491 A3 CS219491 A3 CS 219491A3
Authority
CS
Czechoslovakia
Prior art keywords
sets
acoustic system
combined acoustic
telephone hand
telephone
Prior art date
Application number
CS912194A
Other languages
English (en)
Inventor
Klaus-Peter Kaufmann
Karsten Riewe
Helmut Kammholz
Original Assignee
Nordhausen Fernmeldetech Gmbh
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 Nordhausen Fernmeldetech Gmbh filed Critical Nordhausen Fernmeldetech Gmbh
Publication of CS219491A3 publication Critical patent/CS219491A3/cs

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
    • H04R1/2873—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/06—Arranging circuit leads; Relieving strain on circuit leads
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for telephonic receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Multimedia (AREA)
  • Telephone Set Structure (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
CS912194A 1990-07-20 1991-07-16 Combined acoustic system for telephone hand-sets CS219491A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD34295190A DD301685A9 (de) 1990-07-20 1990-07-20 Akustisches verbundsystem fuer handapparate

Publications (1)

Publication Number Publication Date
CS219491A3 true CS219491A3 (en) 1992-02-19

Family

ID=5620010

Family Applications (1)

Application Number Title Priority Date Filing Date
CS912194A CS219491A3 (en) 1990-07-20 1991-07-16 Combined acoustic system for telephone hand-sets

Country Status (5)

Country Link
EP (1) EP0540553A1 (cs)
CS (1) CS219491A3 (cs)
DD (1) DD301685A9 (cs)
DE (1) DE4042315A1 (cs)
WO (1) WO1992002012A1 (cs)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5511130A (en) * 1994-05-04 1996-04-23 At&T Corp. Single diaphragm second order differential microphone assembly
GB2333004B (en) * 1997-12-31 2002-03-27 Nokia Mobile Phones Ltd Earpiece acoustics
WO2005053357A1 (en) * 2003-11-27 2005-06-09 Seung-Hwan Yi Piezoelectric microspeaker with corrugated diaphragm
KR100791084B1 (ko) * 2006-06-27 2008-01-03 충주대학교 산학협력단 압전형 초소형 스피커 및 그 제조 방법

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1278996A (en) * 1968-11-06 1972-06-21 Motorola Inc Bender bimorph construction
DK62484D0 (da) * 1984-02-13 1984-02-13 Gnt Automatic As Kombineret transducerenhed til mikrotelefon

Also Published As

Publication number Publication date
WO1992002012A1 (de) 1992-02-06
DD301685A9 (de) 1993-06-24
DE4042315A1 (de) 1992-04-09
EP0540553A1 (de) 1993-05-12

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