GB819146A - Improvements in or relating to acoustic impedance devices - Google Patents

Improvements in or relating to acoustic impedance devices

Info

Publication number
GB819146A
GB819146A GB3603156A GB3603156A GB819146A GB 819146 A GB819146 A GB 819146A GB 3603156 A GB3603156 A GB 3603156A GB 3603156 A GB3603156 A GB 3603156A GB 819146 A GB819146 A GB 819146A
Authority
GB
United Kingdom
Prior art keywords
holes
slots
areas
diaphragm
array
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
Application number
GB3603156A
Other languages
English (en)
Inventor
James Samuel Paterson Roberton
Keith William Arthur Walker
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.)
STC PLC
Original Assignee
Standard Telephone and Cables 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
Priority to BE562680D priority Critical patent/BE562680A/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB3603156A priority patent/GB819146A/en
Publication of GB819146A publication Critical patent/GB819146A/en
Expired legal-status Critical Current

Links

Classifications

    • 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 

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Transducers For Ultrasonic Waves (AREA)
GB3603156A 1956-11-26 1956-11-26 Improvements in or relating to acoustic impedance devices Expired GB819146A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE562680D BE562680A (enExample) 1956-11-26
GB3603156A GB819146A (en) 1956-11-26 1956-11-26 Improvements in or relating to acoustic impedance devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3603156A GB819146A (en) 1956-11-26 1956-11-26 Improvements in or relating to acoustic impedance devices

Publications (1)

Publication Number Publication Date
GB819146A true GB819146A (en) 1959-08-26

Family

ID=10384198

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3603156A Expired GB819146A (en) 1956-11-26 1956-11-26 Improvements in or relating to acoustic impedance devices

Country Status (2)

Country Link
BE (1) BE562680A (enExample)
GB (1) GB819146A (enExample)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0035220A1 (de) * 1980-02-29 1981-09-09 Siemens Aktiengesellschaft Elektroakustischer Wandler
EP0081780A1 (de) * 1981-12-10 1983-06-22 International Standard Electric Corporation Elektrodynamischer Wandler
FR2542550A1 (fr) * 1983-03-07 1984-09-14 Thomson Csf Transducteur electroacoustique a correction acoustique integree
EP0232096A3 (en) * 1986-01-23 1988-10-05 Plessey Overseas Limited Acoustic transducers
GB2324262A (en) * 1997-04-11 1998-10-21 Bpb Plc A punch for perforating a cementitious tile

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0035220A1 (de) * 1980-02-29 1981-09-09 Siemens Aktiengesellschaft Elektroakustischer Wandler
EP0081780A1 (de) * 1981-12-10 1983-06-22 International Standard Electric Corporation Elektrodynamischer Wandler
FR2542550A1 (fr) * 1983-03-07 1984-09-14 Thomson Csf Transducteur electroacoustique a correction acoustique integree
EP0232096A3 (en) * 1986-01-23 1988-10-05 Plessey Overseas Limited Acoustic transducers
GB2324262A (en) * 1997-04-11 1998-10-21 Bpb Plc A punch for perforating a cementitious tile
GB2324262B (en) * 1997-04-11 2001-02-07 Bpb Plc Cementitious tile

Also Published As

Publication number Publication date
BE562680A (enExample)

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