GB1465094A - Dynamic loudspeaker for speech transmission - Google Patents

Dynamic loudspeaker for speech transmission

Info

Publication number
GB1465094A
GB1465094A GB3045774A GB3045774A GB1465094A GB 1465094 A GB1465094 A GB 1465094A GB 3045774 A GB3045774 A GB 3045774A GB 3045774 A GB3045774 A GB 3045774A GB 1465094 A GB1465094 A GB 1465094A
Authority
GB
United Kingdom
Prior art keywords
apertures
enclosure
diaphragm
connections
loud
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
GB3045774A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1465094A publication Critical patent/GB1465094A/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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/10—Telephone receivers
    • 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 
    • H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for telephonic receivers

Abstract

1465094 Loud-speakers H PEIKER 9 July 1974 [19 July 1973] 30457/74 Heading H4J In a dynamic loud-speaker substantially limited to the speech frequency range only, connections 7 are provided between the ends 6 of the voice coil and flexible connecting leads 5 (e.g. stranded or fine spiral leads) and these connections 7 are attached to the diaphragm 3. The loud-speaker enclosure 8 to the rear of the diaphragm 3 is connected to the outside air through apertures 14 in a wall 9 of the enclosure 8. These apertures 14 are of such a size and number that the cut-off frequency of the low pass filter formed by the rear enclosure 8 and the apertures 14 lies immediately below the speech frequency range. The arrangement makes unlikely breakage of the voice coil wire in the vicinity of the connection after prolonged use. The leads 5 connect to soldering lugs 4 on the chassis 2. Lacquer seals a hole in the diaphragm 3 at the connections 7. The enclosure 8 is cylindrical and the apertures 14 are in a circular array arranged symmetrically with respect to the diaphragm 3. The front end of the enclosure 8 has a screw cap 11 having apertures (not shown) for emission of sound. The magnet system 1 is mounted between two strip-shaped projections 12.
GB3045774A 1973-07-19 1974-07-09 Dynamic loudspeaker for speech transmission Expired GB1465094A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1055273A CH558121A (en) 1973-07-19 1973-07-19 DYNAMIC SMALL SPEAKER FOR VOICE TRANSMISSION.

Publications (1)

Publication Number Publication Date
GB1465094A true GB1465094A (en) 1977-02-23

Family

ID=4364418

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3045774A Expired GB1465094A (en) 1973-07-19 1974-07-09 Dynamic loudspeaker for speech transmission

Country Status (3)

Country Link
CH (1) CH558121A (en)
FR (1) FR2238308B1 (en)
GB (1) GB1465094A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0733508Y2 (en) * 1984-10-31 1995-07-31 ソニー株式会社 earphone
EP0232096B1 (en) * 1986-01-23 1991-12-27 Siemens Plessey Electronic Systems Limited Acoustic transducers

Also Published As

Publication number Publication date
FR2238308B1 (en) 1982-10-08
FR2238308A1 (en) 1975-02-14
CH558121A (en) 1975-01-15
DE2411497A1 (en) 1975-02-06
DE2411497B2 (en) 1976-04-08

Similar Documents

Publication Publication Date Title
US10715905B2 (en) Noise cancelling earphone integrated with filter module
EP0276996A2 (en) Microphone
GB1426142A (en) Earpiece for earphones
KR860001868Y1 (en) A speaker unit
GB1504065A (en) Headphone
US4528426A (en) Directional microphone assembly
CA2181555A1 (en) A Modular Tweeter
CN111182426A (en) Bone conduction speaker and compound speaker
ES435283A1 (en) Low distortion pyramidal dispersion speaker
GB1465094A (en) Dynamic loudspeaker for speech transmission
GB969288A (en) Transducer
US5144656A (en) Transmitter for communication equipment
CN211406274U (en) Bone conduction speaker and compound speaker
EP1515581B1 (en) Speaker housing
US2607857A (en) Telephone handset
CN216852298U (en) Four-sound-cavity earphone capable of improving sound effect
GB1451169A (en) Omnidirectional loudspeaker
EP0991297A3 (en) 3D woofer drive circuit
CN216017088U (en) Sound box with bass expanding effect
GB1468787A (en) Audio loudspeakers
CN220210564U (en) High-low sound separation type high-fidelity sound box
CN215581691U (en) Compact earphone speaker with independent cavity
CN207732968U (en) A kind of loudspeaker group
KR860001869Y1 (en) A speaker unit
JPS6025194Y2 (en) Acoustic Feedback System

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee