GB319408A - Improvements in or relating to sound reproducing devices - Google Patents

Improvements in or relating to sound reproducing devices

Info

Publication number
GB319408A
GB319408A GB1829228A GB1829228A GB319408A GB 319408 A GB319408 A GB 319408A GB 1829228 A GB1829228 A GB 1829228A GB 1829228 A GB1829228 A GB 1829228A GB 319408 A GB319408 A GB 319408A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
cabinet
chamber
resonance
horn
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
GB1829228A
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.)
Victor Talking Machine Co
Original Assignee
Victor Talking Machine Co
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 Victor Talking Machine Co filed Critical Victor Talking Machine Co
Priority to GB1829228A priority Critical patent/GB319408A/en
Publication of GB319408A publication Critical patent/GB319408A/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
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns
    • 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
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2838—Enclosures comprising vibrating or resonating arrangements of the bandpass type
    • H04R1/2842—Enclosures comprising vibrating or resonating arrangements of the bandpass type 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)

Abstract

319,408. Gramophone Co., Ltd., (Victor Talking Machine Co.). June 23, 1928. Loud-speakers. - An inertia-controlled diaphragm is provided on both sides with a resonance-chamber, one being in the form of a short horn and the other being constituted by the cabinet in which the diaphragm is mounted. The cross-sectional area of the resonance-chamber in planes perpendicular to the direction of vibration of the diaphragm, and the outlet areas, are at least as great as the projected area of the diaphragm. The two chambers are preferably resonant at different frequencies, the higher of the two resonances being more heavily damped than the lower. The conical diaphragm 1 of a moving-coil loud-speaker is resiliently mounted on an annulus 3 of rubber &c., the magnet system 5 being supported on a cross-bar 11 mounted in a cabinet 8. A horn-shaped baffle 6 extends from the periphery of the diaphragm to a larger aperture in the front panel 9 of the cabinet, while an aperture greater than the projected area of the diaphragm is formed in the back panel 10, and is covered with sound transmitting fabric. Alternatively vents for the rear resonance chamber are formed in the other walls, 7, of the cabinet. In a further modification, Fig. 4, the diaphragm faces the back of the cabinet and a folded two branched horn 13, 14 opens in a single mouth in the front panel 9 of the cabinet, which is provided with vents 12 for the second resonance chamber. Specification 288,276 is referred to.
GB1829228A 1928-06-23 1928-06-23 Improvements in or relating to sound reproducing devices Expired GB319408A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1829228A GB319408A (en) 1928-06-23 1928-06-23 Improvements in or relating to sound reproducing devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1829228A GB319408A (en) 1928-06-23 1928-06-23 Improvements in or relating to sound reproducing devices

Publications (1)

Publication Number Publication Date
GB319408A true GB319408A (en) 1929-09-23

Family

ID=10109953

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1829228A Expired GB319408A (en) 1928-06-23 1928-06-23 Improvements in or relating to sound reproducing devices

Country Status (1)

Country Link
GB (1) GB319408A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2900040A (en) * 1955-09-12 1959-08-18 Muter Company Loudspeaker system
US3129782A (en) * 1961-05-04 1964-04-21 James Willis Hughes Public address apparatus
US3129783A (en) * 1960-10-26 1964-04-21 James W Hughes Housing and mount for loud speakers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2900040A (en) * 1955-09-12 1959-08-18 Muter Company Loudspeaker system
US3129783A (en) * 1960-10-26 1964-04-21 James W Hughes Housing and mount for loud speakers
US3129782A (en) * 1961-05-04 1964-04-21 James Willis Hughes Public address apparatus

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