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DK295384A - SPEAKER - Google Patents

SPEAKER Download PDF

Info

Publication number
DK295384A
DK295384A DK295384A DK295384A DK295384A DK 295384 A DK295384 A DK 295384A DK 295384 A DK295384 A DK 295384A DK 295384 A DK295384 A DK 295384A DK 295384 A DK295384 A DK 295384A
Authority
DK
Denmark
Prior art keywords
speaker
Prior art date
Application number
DK295384A
Other languages
Danish (da)
Other versions
DK295384D0 (en
Inventor
Pekka Saastamoinen
Kimmo Leskinen
Original Assignee
Polarpro Oy
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 Polarpro Oy filed Critical Polarpro Oy
Publication of DK295384D0 publication Critical patent/DK295384D0/en
Publication of DK295384A publication Critical patent/DK295384A/en

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
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers
    • H04R1/347—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers for obtaining a phase-shift between the front and back acoustic wave
    • 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 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
    • H04R1/2876—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding
    • H04R1/288—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding for loudspeaker transducers

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
DK295384A 1982-10-18 1984-06-15 SPEAKER DK295384A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI823540A FI823540A0 (en) 1982-10-18 1982-10-18 HOEGTALARE
PCT/FI1983/000065 WO1984001681A1 (en) 1982-10-18 1983-10-17 Loudspeaker

Publications (2)

Publication Number Publication Date
DK295384D0 DK295384D0 (en) 1984-06-15
DK295384A true DK295384A (en) 1984-06-15

Family

ID=8516169

Family Applications (1)

Application Number Title Priority Date Filing Date
DK295384A DK295384A (en) 1982-10-18 1984-06-15 SPEAKER

Country Status (4)

Country Link
EP (1) EP0141813A1 (en)
DK (1) DK295384A (en)
FI (1) FI823540A0 (en)
WO (1) WO1984001681A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2612721B1 (en) * 1987-03-16 1989-06-16 Hautreux Francois ACOUSTIC SPEAKER ACCORDING TO THE SPEAKER FREQUENCY
IT239248Y1 (en) * 1995-09-13 2001-02-26 Autosonik Spa REAR PROTECTION FOR SPEAKERS
US7551062B2 (en) 2005-03-14 2009-06-23 American Technology Corporation Directional acoustic device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1812213A (en) * 1927-03-30 1931-06-30 United Reproducers Corp Loud speaker
US1841101A (en) * 1930-03-06 1932-01-12 Bell Telephone Labor Inc Loud speaker
US2065751A (en) * 1935-12-31 1936-12-29 Rca Corp Acoustic resistance device
DE726436C (en) * 1937-01-23 1942-10-14 Philips Patentverwaltung Loudspeaker in a box with an acoustic resistor
US2713396A (en) * 1950-05-24 1955-07-19 Ernest A Tavares Novel, small, extended low frequency response, loudspeaker enclosure
US2991840A (en) * 1957-09-12 1961-07-11 Glenn C Van Camp Sound reproducer
US3953675A (en) * 1972-05-08 1976-04-27 Babbco, Ltd. Audio speaker system
HU173844B (en) * 1976-09-15 1979-09-28 Elektroakusztikai Gyar Cardioid acoustic radiator

Also Published As

Publication number Publication date
DK295384D0 (en) 1984-06-15
WO1984001681A1 (en) 1984-04-26
EP0141813A1 (en) 1985-05-22
FI823540A0 (en) 1982-10-18

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Legal Events

Date Code Title Description
AHB Application shelved due to non-payment