GB1076821A - Improvements in acoustic systems - Google Patents

Improvements in acoustic systems

Info

Publication number
GB1076821A
GB1076821A GB3277/64A GB327764A GB1076821A GB 1076821 A GB1076821 A GB 1076821A GB 3277/64 A GB3277/64 A GB 3277/64A GB 327764 A GB327764 A GB 327764A GB 1076821 A GB1076821 A GB 1076821A
Authority
GB
United Kingdom
Prior art keywords
loud
speaker
tuned
filter
amplifier
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
GB3277/64A
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.)
MINI OF TECHNOLOGY
Minister of Technology
Original Assignee
MINI OF TECHNOLOGY
Minister of Technology
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 claimed from GB3996959A external-priority patent/GB974701A/en
Application filed by MINI OF TECHNOLOGY, Minister of Technology filed Critical MINI OF TECHNOLOGY
Priority to GB3277/64A priority Critical patent/GB1076821A/en
Priority to DEC33578A priority patent/DE1272993B/en
Priority to US388868A priority patent/US3392240A/en
Priority to NL646409660A priority patent/NL144412B/en
Priority to FR985920A priority patent/FR1405014A/en
Priority to DK413564AA priority patent/DK126469B/en
Priority to SE10134/64A priority patent/SE310000B/xx
Priority to NO154479A priority patent/NO118384B/no
Publication of GB1076821A publication Critical patent/GB1076821A/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

Abstract

1,076,821. Reverberation systems. MINISTER OF TECHNOLOGY. Aug. 4, 1964 [Jan. 24, 1964], No. 3277/64. Addition to 974,701. Heading H4R. [Also in Division G5] In a reverberation system such as described in Specification 974,701, each microphoneamplifier-loud-speaker unit includes a variable gain amplifier and has associated with it a filter tuned to the resonant mode frequency controlled by such unit. The filter may be an electrical filter for tuning the amplifier, a mechanical filter such as an electrically driven tuning fork or tuned vibrating reed, but is preferably a Helmholtz resonator housing the microphone. The loud-speaker may be tuned by a tube. Several microphones, each within a respective Helmholtz resonator tuned to a different frequency, may feed a single amplifier and loudspeaker, the loud-speaker having connected to it a multiple tube array, tne tubes being tuned to the respective resonant frequencies. The microphone and loud-speaker of a unit are located in the vicinity of the resonant mode frequency which they control and a phase-shift network ensures that sound energy fed into the auditorium by the loud-speaker is in phase with the sound energy of the mode at that location.
GB3277/64A 1959-11-25 1964-01-24 Improvements in acoustic systems Expired GB1076821A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
GB3277/64A GB1076821A (en) 1959-11-25 1964-01-24 Improvements in acoustic systems
DEC33578A DE1272993B (en) 1964-01-24 1964-08-05 Arrangement for the controllable increase of the reverberation time of a listening room
US388868A US3392240A (en) 1964-01-24 1964-08-11 Acoustic systems
NL646409660A NL144412B (en) 1964-01-24 1964-08-20 SPACE ENCLOSED BY SOUND REFLECTIVE SURFACES.
FR985920A FR1405014A (en) 1964-01-24 1964-08-21 Improvements to acoustic systems
DK413564AA DK126469B (en) 1964-01-24 1964-08-21 Method and system for improving the acoustic properties of an auditorium.
SE10134/64A SE310000B (en) 1964-01-24 1964-08-21
NO154479A NO118384B (en) 1964-01-24 1964-08-21

Applications Claiming Priority (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

Publications (1)

Publication Number Publication Date
GB1076821A true GB1076821A (en) 1967-07-26

Family

ID=9755298

Family Applications (1)

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

Country Status (8)

Country Link
US (1) US3392240A (en)
DE (1) DE1272993B (en)
DK (1) DK126469B (en)
FR (1) FR1405014A (en)
GB (1) GB1076821A (en)
NL (1) NL144412B (en)
NO (1) NO118384B (en)
SE (1) SE310000B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061876A (en) * 1975-09-26 1977-12-06 Jaffe Acoustics, Inc. Electronic sound enhancing system
US4185167A (en) * 1976-06-28 1980-01-22 Acoustical Design Incorporated Sound masking package
NL7901120A (en) * 1979-02-13 1980-08-15 Philips Nv SOUND SYSTEM FOR ARTIFICIAL NAIL.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2542663A (en) * 1948-04-30 1951-02-20 Rca Corp Acoustic studio with variable reverberation time

Also Published As

Publication number Publication date
NO118384B (en) 1969-12-22
NL6409660A (en) 1965-07-26
SE310000B (en) 1969-04-14
DK126469B (en) 1973-07-16
US3392240A (en) 1968-07-09
NL144412B (en) 1974-12-16
FR1405014A (en) 1965-07-02
DE1272993B (en) 1968-07-18

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