GB873513A - Improvements in or relating to transducers - Google Patents

Improvements in or relating to transducers

Info

Publication number
GB873513A
GB873513A GB12712/61A GB1271261A GB873513A GB 873513 A GB873513 A GB 873513A GB 12712/61 A GB12712/61 A GB 12712/61A GB 1271261 A GB1271261 A GB 1271261A GB 873513 A GB873513 A GB 873513A
Authority
GB
United Kingdom
Prior art keywords
boost
speakers
loud
network
shunted
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
GB12712/61A
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.)
AMAR GOPAL BOSE
Original Assignee
AMAR GOPAL BOSE
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 US602195A external-priority patent/US2915588A/en
Application filed by AMAR GOPAL BOSE filed Critical AMAR GOPAL BOSE
Publication of GB873513A publication Critical patent/GB873513A/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
    • 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 
    • H04R1/227—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  using transducers reproducing the same frequency band

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

Abstract

873,513. Circuits for loud-speakers. BOSE, A. G. July 30, 1957 [Aug. 6, 1956], No. 12712/61. Divided out of 873,511. Class 40 (4). An array of closely-spaced loud-speakers is driven over a compensation network which extends their range by providing a boost at low frequencies. The network may also provide a boost to extend the range at high frequencies. The loud-speakers are distributed over the surface of a spherical surface as described in Specification 873,511. Fig. 8 shows a circuit that passes the audio range with boost at high and low frequencies. Valves V1 and V2 provide the low frequency boost by virtue of capacitors 50 shunted by resistors 51 in the anode circuits which present high impedance at low frequency. Valves V3 and V4 provide the high frequency boost by virtue of cathode circuits containing capacitors 55 shunted by resistors 56 presenting a low impedance or high frequency. The inter-valve coupling of capacitor 63 shunted by resistor 64 increases the high frequency boost. The output of the network may be applied to a cathode follower before being applied to preamplifier and power amplifier stages. The loud-speakers are connected in phase and in series or parallel or in seriesparallel. In place of a separate network compensation may be integrated in the design of the preamplifier and/or the power amplifier.
GB12712/61A 1956-08-06 1957-07-30 Improvements in or relating to transducers Expired GB873513A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US602195A US2915588A (en) 1956-08-06 1956-08-06 Pressure wave generation
US629084A US3038964A (en) 1956-08-06 1956-12-18 Loudspeaker system

Publications (1)

Publication Number Publication Date
GB873513A true GB873513A (en) 1961-07-26

Family

ID=27084068

Family Applications (4)

Application Number Title Priority Date Filing Date
GB12712/61A Expired GB873513A (en) 1956-08-06 1957-07-30 Improvements in or relating to transducers
GB12711/61A Expired GB873512A (en) 1956-08-06 1957-07-30 Improvements in or relating to transducers
GB24166/57A Expired GB873511A (en) 1956-08-06 1957-07-30 Improvements in or relating to transducers
GB39388/57A Expired GB887464A (en) 1956-08-06 1957-12-18 Improvements in or relating to loudspeaker transducing systems

Family Applications After (3)

Application Number Title Priority Date Filing Date
GB12711/61A Expired GB873512A (en) 1956-08-06 1957-07-30 Improvements in or relating to transducers
GB24166/57A Expired GB873511A (en) 1956-08-06 1957-07-30 Improvements in or relating to transducers
GB39388/57A Expired GB887464A (en) 1956-08-06 1957-12-18 Improvements in or relating to loudspeaker transducing systems

Country Status (2)

Country Link
US (1) US3038964A (en)
GB (4) GB873513A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2168143A1 (en) * 1971-12-23 1973-08-31 Semenovich Gendin

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2363955A1 (en) * 1976-09-02 1978-03-31 Bose Corp MULTI-SPEAKER ENGINE SPEAKER
DE3142462A1 (en) * 1980-10-28 1982-05-27 Hans-Peter 7000 Stuttgart Pfeiffer Loudspeaker device
US4633229A (en) * 1982-07-12 1986-12-30 Federal Signal Corporation Electronic outdoor warning siren
GB2224908A (en) * 1988-11-09 1990-05-16 Haqi Ismail Hussain Almossawi Stereo speaker
US5160896A (en) * 1992-02-18 1992-11-03 Harman International Industries, Incorporated Class D amplifier
US5594386A (en) * 1995-04-21 1997-01-14 Sipex Corporation Pulse width modulated amplifier
US20030198358A1 (en) * 2002-04-19 2003-10-23 Hoover Alan Anderson Loudspeaker arrangement and switching apparatus therefor
US7469052B2 (en) * 2004-06-18 2008-12-23 Peavey Electronics Corporation Portable sound system, apparatus, and method
FR3049341B1 (en) * 2016-03-23 2019-06-14 Cryostar Sas SYSTEM FOR TREATING A GAS FROM THE EVAPORATION OF A CRYOGENIC LIQUID AND THE PRESSURIZED GAS SUPPLY OF A GAS ENGINE

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1397575A (en) * 1915-04-09 1921-11-22 Forest Radio Telephone And Tel Selective audion-amplifier
US1478078A (en) * 1921-07-06 1923-12-18 Western Electric Co Equalizing network
US1914629A (en) * 1930-10-28 1933-06-20 Aguirre Maximo Electrical network
US1984450A (en) * 1931-02-03 1934-12-18 Louis Gerard Pacent Compensated amplifier
US2065344A (en) * 1933-02-01 1936-12-22 Gen Electric Control means for signal control transmission systems
US2354537A (en) * 1943-03-17 1944-07-25 Gen Electric Wide band coupling for transmission lines
US2602860A (en) * 1947-11-18 1952-07-08 Doubt Leon Stewart Loud-speaker structure
US2632055A (en) * 1949-04-18 1953-03-17 John E Parker Loud speaker system
US2605355A (en) * 1950-03-17 1952-07-29 George E Foster Audiometer threshold signal adjusting network

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2168143A1 (en) * 1971-12-23 1973-08-31 Semenovich Gendin

Also Published As

Publication number Publication date
GB873511A (en) 1961-07-26
US3038964A (en) 1962-06-12
GB873512A (en) 1961-07-26
GB887464A (en) 1962-01-17

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