DD301685A9 - Akustisches verbundsystem fuer handapparate - Google Patents

Akustisches verbundsystem fuer handapparate Download PDF

Info

Publication number
DD301685A9
DD301685A9 DD34295190A DD34295190A DD301685A9 DD 301685 A9 DD301685 A9 DD 301685A9 DD 34295190 A DD34295190 A DD 34295190A DD 34295190 A DD34295190 A DD 34295190A DD 301685 A9 DD301685 A9 DD 301685A9
Authority
DD
German Democratic Republic
Prior art keywords
sound membrane
acoustic
cavity
radial beads
sound
Prior art date
Application number
DD34295190A
Other languages
German (de)
English (en)
Inventor
Claus-Peter Dipl-Ing Kaufmann
Helmut Kammholz
Carsten Dipl-Ing Riewe
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
Priority to DD34295190A priority Critical patent/DD301685A9/de
Priority to DE19904042315 priority patent/DE4042315A1/de
Priority to PCT/DE1991/000567 priority patent/WO1992002012A1/de
Priority to EP19910912649 priority patent/EP0540553A1/de
Priority to CS912194A priority patent/CS219491A3/cs
Publication of DD301685A9 publication Critical patent/DD301685A9/de

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; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; 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)
DD34295190A 1990-07-20 1990-07-20 Akustisches verbundsystem fuer handapparate DD301685A9 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DD34295190A DD301685A9 (de) 1990-07-20 1990-07-20 Akustisches verbundsystem fuer handapparate
DE19904042315 DE4042315A1 (de) 1990-07-20 1990-12-29 Akustisches verbundsystem fuer handapparate
PCT/DE1991/000567 WO1992002012A1 (de) 1990-07-20 1991-07-08 Akustisches verbundsystem für handapparate
EP19910912649 EP0540553A1 (de) 1990-07-20 1991-07-08 Akustisches verbundsystem für handapparate
CS912194A CS219491A3 (en) 1990-07-20 1991-07-16 Combined acoustic system for telephone hand-sets

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
DD301685A9 true DD301685A9 (de) 1993-06-24

Family

ID=5620010

Family Applications (1)

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

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
AU2003304673A1 (en) * 2003-11-27 2005-06-17 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
DE4042315A1 (de) 1992-04-09
EP0540553A1 (de) 1993-05-12
CS219491A3 (en) 1992-02-19

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Legal Events

Date Code Title Description
NAA Public notice for inspection of patent application
A9 Laid open application accord. to par. 10.3 extension act