GB1252411A - - Google Patents

Info

Publication number
GB1252411A
GB1252411A GB4842967A GB1252411DA GB1252411A GB 1252411 A GB1252411 A GB 1252411A GB 4842967 A GB4842967 A GB 4842967A GB 1252411D A GB1252411D A GB 1252411DA GB 1252411 A GB1252411 A GB 1252411A
Authority
GB
United Kingdom
Prior art keywords
microphone
frequency
socket
transmitter
compensating circuit
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
GB4842967A
Other languages
English (en)
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 filed Critical
Publication of GB1252411A publication Critical patent/GB1252411A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
    • H04B5/24—Inductive coupling
    • H04B5/26—Inductive coupling using coils
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R27/00—Public address systems
    • H04R27/02—Amplifying systems for the deaf

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Headphones And Earphones (AREA)
GB4842967A 1967-10-25 1967-10-25 Expired GB1252411A (https=)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB4842967 1967-10-25
GB5755467 1967-12-19
GB3690468 1968-08-02

Publications (1)

Publication Number Publication Date
GB1252411A true GB1252411A (https=) 1971-11-03

Family

ID=27259400

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4842967A Expired GB1252411A (https=) 1967-10-25 1967-10-25

Country Status (1)

Country Link
GB (1) GB1252411A (https=)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4790019A (en) * 1984-07-18 1988-12-06 Viennatone Gesellschaft M.B.H. Remote hearing aid volume control
US4918736A (en) * 1984-09-27 1990-04-17 U.S. Philips Corporation Remote control system for hearing aids

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4790019A (en) * 1984-07-18 1988-12-06 Viennatone Gesellschaft M.B.H. Remote hearing aid volume control
US4918736A (en) * 1984-09-27 1990-04-17 U.S. Philips Corporation Remote control system for hearing aids

Similar Documents

Publication Publication Date Title
US4334315A (en) Wireless transmitting and receiving systems including ear microphones
EP0563194B1 (en) Hearing aid system
US6438245B1 (en) Hearing aid communications earpiece
US3882285A (en) Implantable hearing aid and method of improving hearing
US5966639A (en) System and method for enhancing speech intelligibility utilizing wireless communication
EP1783919B1 (en) The nasal bone conduction wireless communication transmission equipment
US5138664A (en) Noise reducing device
US3742359A (en) Auditory training device with radio receiver and hearing aid
US7548617B2 (en) Bluetooth earphone
GB2071375A (en) Automatic transmission or recording control system
US4132861A (en) Headset having double-coil earphone
DE3826294A1 (de) Freisprecheinrichtung fuer kommunikationssysteme
GB1163796A (en) Headphone Apparatus
US2573438A (en) Electroacoustic transducer set
US4085365A (en) Earphone adapter for aircraft radios
GB1252411A (https=)
KR101000127B1 (ko) 음력전화장치용 헤드세트
CN206807701U (zh) 基于nfc技术的蓝牙耳机
GB761169A (en) Improvements in or relating to hearing aids
GB757788A (en) Improvements in or relating to hearing aids
KR200357328Y1 (ko) 복합 보청 시스템
GB2198612A (en) Ear piece
JPS60192287A (ja) イヤホン付き目覚し時計
JPS646605Y2 (https=)
CN207664978U (zh) 对讲机

Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed