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GB2218299B - Artificial mouth - Google Patents

Artificial mouth

Info

Publication number
GB2218299B
GB2218299B GB8730346A GB8730346A GB2218299B GB 2218299 B GB2218299 B GB 2218299B GB 8730346 A GB8730346 A GB 8730346A GB 8730346 A GB8730346 A GB 8730346A GB 2218299 B GB2218299 B GB 2218299B
Authority
GB
United Kingdom
Prior art keywords
artificial mouth
artificial
mouth
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.)
Expired - Lifetime
Application number
GB8730346A
Other versions
GB8730346D0 (en
GB2218299A (en
Inventor
Robin Christopher Cross
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
British Telecommunications PLC
Original Assignee
British Telecommunications PLC
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 British Telecommunications PLC filed Critical British Telecommunications PLC
Priority to GB8730346A priority Critical patent/GB2218299B/en
Publication of GB8730346D0 publication Critical patent/GB8730346D0/en
Publication of GB2218299A publication Critical patent/GB2218299A/en
Application granted granted Critical
Publication of GB2218299B publication Critical patent/GB2218299B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • H04R1/22—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
    • H04R1/2876—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding
    • H04R1/288—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/24—Arrangements for testing

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
GB8730346A 1987-12-31 1987-12-31 Artificial mouth Expired - Lifetime GB2218299B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8730346A GB2218299B (en) 1987-12-31 1987-12-31 Artificial mouth

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8730346A GB2218299B (en) 1987-12-31 1987-12-31 Artificial mouth

Publications (3)

Publication Number Publication Date
GB8730346D0 GB8730346D0 (en) 1988-02-03
GB2218299A GB2218299A (en) 1989-11-08
GB2218299B true GB2218299B (en) 1991-08-21

Family

ID=10629188

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8730346A Expired - Lifetime GB2218299B (en) 1987-12-31 1987-12-31 Artificial mouth

Country Status (1)

Country Link
GB (1) GB2218299B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9213459D0 (en) * 1992-06-24 1992-08-05 British Telecomm Characterisation of communications systems using a speech-like test stimulus
US5890104A (en) * 1992-06-24 1999-03-30 British Telecommunications Public Limited Company Method and apparatus for testing telecommunications equipment using a reduced redundancy test signal
EP0705501B1 (en) * 1993-06-21 1999-11-17 BRITISH TELECOMMUNICATIONS public limited company Method and apparatus for testing telecommunications equipment using a reduced redundancy test signal
JPH09505701A (en) * 1993-11-25 1997-06-03 ブリテイッシュ・テレコミュニケーションズ・パブリック・リミテッド・カンパニー Testing telecommunications equipment
GB9604315D0 (en) * 1996-02-29 1996-05-01 British Telecomm Training process
US6119083A (en) * 1996-02-29 2000-09-12 British Telecommunications Public Limited Company Training process for the classification of a perceptual signal
FR2810116A1 (en) * 2000-06-07 2001-12-14 Arf Test Test device for a mobile phone, has microphone and loud speaker mounted in separate test heads with annular covers at the bottom of the heads to ensure good coupling to the phone under test so that background noise is suppressed

Also Published As

Publication number Publication date
GB8730346D0 (en) 1988-02-03
GB2218299A (en) 1989-11-08

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19961231