GB817899A - Improvements in loudspeaking apparatus - Google Patents

Improvements in loudspeaking apparatus

Info

Publication number
GB817899A
GB817899A GB765256A GB765256A GB817899A GB 817899 A GB817899 A GB 817899A GB 765256 A GB765256 A GB 765256A GB 765256 A GB765256 A GB 765256A GB 817899 A GB817899 A GB 817899A
Authority
GB
United Kingdom
Prior art keywords
loud
march
speaker
centre
terms
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
GB765256A
Inventor
Paul Harvard Taylor
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.)
PAMPHONIC RERPODUCERS Ltd
Original Assignee
PAMPHONIC RERPODUCERS Ltd
Filing date
Publication date
Application filed by PAMPHONIC RERPODUCERS Ltd filed Critical PAMPHONIC RERPODUCERS Ltd
Publication of GB817899A publication Critical patent/GB817899A/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; 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
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers

Abstract

817,899. Sound directive appliances. PAMPHONIC REPRODUCERS Ltd. March 12, 1957 [March 12, 1956], No. 7652/56. Class 13. [Also in Group XXXIX] The radiations from the individual loudspeakers or elemental portions of a line source column loud-speaker diminish away from the centre of the column according to a law approximating to a truncated set of binomial coefficients. As an example the 9 centre terms of a 13-term binomial series may be taken and 9 loud-speakers or elemental portions of an electrostatic loud-speaker may be fed with voltages corresponding to these terms.
GB765256A 1956-03-12 Improvements in loudspeaking apparatus Expired GB817899A (en)

Publications (1)

Publication Number Publication Date
GB817899A true GB817899A (en) 1959-08-06

Family

ID=1629056

Family Applications (1)

Application Number Title Priority Date Filing Date
GB765256A Expired GB817899A (en) 1956-03-12 Improvements in loudspeaking apparatus

Country Status (1)

Country Link
GB (1) GB817899A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0034844B1 (en) * 1980-02-25 1983-10-19 Koninklijke Philips Electronics N.V. A direction- and frequency-independent loudspeaker- or microphone-column or a loudspeaker- or microphone-surface

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0034844B1 (en) * 1980-02-25 1983-10-19 Koninklijke Philips Electronics N.V. A direction- and frequency-independent loudspeaker- or microphone-column or a loudspeaker- or microphone-surface

Similar Documents

Publication Publication Date Title
GB817899A (en) Improvements in loudspeaking apparatus
GB894900A (en) Improvements in or relating to electronic apparatus incorporating electrostatic loudspeakers
GB829214A (en) Improvements in loud speaker systems
GB978781A (en) Improvements in or relating to sound reproducing apparatus
GB857413A (en) Improvements in or relating to cone loudspeakers
GB838021A (en) Improvements in electrostatic loudspeakers
GB832844A (en) Improvements in or relating to moving coil loudspeakers
AU234667B2 (en) Improvements in or relating to electrodynamic devices, more particularly microphones or loudspeakers
CA579129A (en) Acoustic enclosure for loudspeakers
CA589101A (en) Selectively amplifying loud-speaking telephone
AU247422B2 (en) Circuit arrangement for amplified telephone sets ofthe loudspeaker type
CA582834A (en) Telephone and microphone
CA589109A (en) Loud speaker
AU237457B2 (en) Improvements in loudspeaker diaphragm units
AU5741960A (en) Circuit arrangement for amplified telephone sets ofthe loudspeaker type
AU250952B2 (en) Stereophonic loudspeaker system
AU209702B2 (en) Improvements in telephone subscribers sets
CA572016A (en) Electronic telephone system
AU225541B2 (en) An improved subscribers' register for telephone installations
GB804215A (en) Improvements in or relating to the weather-proofing of electrical apparatus
AU208200B2 (en) Telephone desk set
CA522215A (en) Intercommunication telephone systems
CA533984A (en) Telephone system
CA581794A (en) Auto-selecting cross-bar telephone system
CA529366A (en) Telephone calendar