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HK1003472A1 - Single diaphragm second order differential microphone assembly - Google Patents

Single diaphragm second order differential microphone assembly Download PDF

Info

Publication number
HK1003472A1
HK1003472A1 HK98102579A HK98102579A HK1003472A1 HK 1003472 A1 HK1003472 A1 HK 1003472A1 HK 98102579 A HK98102579 A HK 98102579A HK 98102579 A HK98102579 A HK 98102579A HK 1003472 A1 HK1003472 A1 HK 1003472A1
Authority
HK
Hong Kong
Prior art keywords
ports
microphone
channels
cavity
conduits
Prior art date
Application number
HK98102579A
Other languages
German (de)
English (en)
French (fr)
Chinese (zh)
Other versions
HK1003472B (en
Inventor
Spurgeon Bartlett Charles
Anthony Zuniga Michael
Original Assignee
At & T Corp.
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 At & T Corp. filed Critical At & T Corp.
Publication of HK1003472A1 publication Critical patent/HK1003472A1/en
Publication of HK1003472B publication Critical patent/HK1003472B/en

Links

Classifications

    • 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
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/342—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for microphones
    • 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
    • H04M1/19—Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Mouthpieces or receivers specially adapted therefor
    • 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
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/38—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/01—Electrostatic transducers characterised by the use of electrets
    • H04R19/016—Electrostatic transducers characterised by the use of electrets for microphones

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Telephone Set Structure (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
HK98102579.8A 1994-05-04 1998-03-26 Single diaphragm second order differential microphone assembly HK1003472B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/237,798 US5511130A (en) 1994-05-04 1994-05-04 Single diaphragm second order differential microphone assembly
US237798 1994-05-04

Publications (2)

Publication Number Publication Date
HK1003472A1 true HK1003472A1 (en) 1998-10-30
HK1003472B HK1003472B (en) 2002-03-15

Family

ID=

Also Published As

Publication number Publication date
TW277200B (ru) 1996-06-01
CA2143226C (en) 1999-01-12
CN1114479A (zh) 1996-01-03
FI952106A0 (fi) 1995-05-03
EP0681410B1 (en) 2001-11-14
DE69523811D1 (de) 2001-12-20
US5511130A (en) 1996-04-23
RU95106477A (ru) 1996-12-10
KR950035512A (ko) 1995-12-30
EP0681410A2 (en) 1995-11-08
CA2143226A1 (en) 1995-11-05
DE69523811T2 (de) 2002-06-27
FI952106A7 (fi) 1995-11-05
FI952106L (fi) 1995-11-05
JPH07307990A (ja) 1995-11-21
JP3338235B2 (ja) 2002-10-28
EP0681410A3 (en) 1999-05-06

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Legal Events

Date Code Title Description
PF Patent in force
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)

Effective date: 20050426