GB974701A - Improvements in acoustic systems - Google Patents

Improvements in acoustic systems

Info

Publication number
GB974701A
GB974701A GB3996959A GB3996959A GB974701A GB 974701 A GB974701 A GB 974701A GB 3996959 A GB3996959 A GB 3996959A GB 3996959 A GB3996959 A GB 3996959A GB 974701 A GB974701 A GB 974701A
Authority
GB
United Kingdom
Prior art keywords
microphone
amplifier
auditorium
mode
gain
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
GB3996959A
Inventor
Peter Hubert Parkin
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.)
Council of Scientific and Industrial Research CSIR
Original Assignee
Council of Scientific and Industrial Research CSIR
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 Council of Scientific and Industrial Research CSIR filed Critical Council of Scientific and Industrial Research CSIR
Priority to GB3996959A priority Critical patent/GB974701A/en
Priority to GB3277/64A priority patent/GB1076821A/en
Publication of GB974701A publication Critical patent/GB974701A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K15/00—Acoustics not otherwise provided for
    • G10K15/08—Arrangements for producing a reverberation or echo sound
    • G10K15/10—Arrangements for producing a reverberation or echo sound using time-delay networks comprising electromechanical or electro-acoustic devices

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Reverberation, Karaoke And Other Acoustics (AREA)

Abstract

974,701. Modifying acoustic properties. COUNCIL FOR SCIENTIFIC & INDUSTRIAL RESEARCH. Nov. 23, 1960 [Nov. 25, 1959], No. 39969/59. Heading G5X. [Also in Division H4] A microphone 13 and loudspeaker 15 are located in an auditorium and are coupled by an amplifier 14 the gain of which is adjustable to control the reverberation of the auditorium. The microphone and loudspeaker are located at points on a selected normal mode of vibration in the auditorium between which a minimum or substantially minimum amplifier gain is required to produce the desired maximum reverberation time for the selected mode, and the amplifier gain is set to a value at which the required reverberation time at the selected mode frequency is obtained. Two or more loudspeakers may be located at different positions and fed from a common microphone and amplifier. A few hundred microphone-amplifierloudspeaker units may be constructed, each unit catering for a different normal mode of vibration. The highest frequency mode may be 2,000 cycles per second, preferably 1,000 cycles per second.
GB3996959A 1959-11-25 1959-11-25 Improvements in acoustic systems Expired GB974701A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3996959A GB974701A (en) 1959-11-25 1959-11-25 Improvements in acoustic systems
GB3277/64A GB1076821A (en) 1959-11-25 1964-01-24 Improvements in acoustic systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3996959A GB974701A (en) 1959-11-25 1959-11-25 Improvements in acoustic systems

Publications (1)

Publication Number Publication Date
GB974701A true GB974701A (en) 1964-11-11

Family

ID=10412486

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3996959A Expired GB974701A (en) 1959-11-25 1959-11-25 Improvements in acoustic systems

Country Status (1)

Country Link
GB (1) GB974701A (en)

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