GB535753A - Improvements in audiphones - Google Patents

Improvements in audiphones

Info

Publication number
GB535753A
GB535753A GB9004/40A GB900440A GB535753A GB 535753 A GB535753 A GB 535753A GB 9004/40 A GB9004/40 A GB 9004/40A GB 900440 A GB900440 A GB 900440A GB 535753 A GB535753 A GB 535753A
Authority
GB
United Kingdom
Prior art keywords
amplifier
choke
microphone
condenser
series 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
GB9004/40A
Other languages
English (en)
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.)
Electrical Research Products Inc
Original Assignee
Electrical Research Products Inc
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 Electrical Research Products Inc filed Critical Electrical Research Products Inc
Publication of GB535753A publication Critical patent/GB535753A/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
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
    • H04R25/502—Customised settings for obtaining desired overall acoustical characteristics using analog signal processing

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
GB9004/40A 1939-06-20 1940-05-21 Improvements in audiphones Expired GB535753A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US535753XA 1939-06-20 1939-06-20

Publications (1)

Publication Number Publication Date
GB535753A true GB535753A (en) 1941-04-21

Family

ID=21985195

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9004/40A Expired GB535753A (en) 1939-06-20 1940-05-21 Improvements in audiphones

Country Status (3)

Country Link
BE (1) BE469534A (OSRAM)
FR (1) FR865911A (OSRAM)
GB (1) GB535753A (OSRAM)

Also Published As

Publication number Publication date
BE469534A (OSRAM)
FR865911A (fr) 1941-06-09

Similar Documents

Publication Publication Date Title
GB936570A (en) Improvements in or relating to hearing aids
GB1325216A (en) Delay and attentuation equalizer
GB636903A (en) Electronic hearing aid
GB535753A (en) Improvements in audiphones
GB633553A (en) Improvements in or relating to a hearing aid apparatus
US2266669A (en) Hearing aid device
GB1031145A (en) Improvements in or relating to audio-frequency amplifiers
GB761169A (en) Improvements in or relating to hearing aids
GB1499976A (en) Hearing aids
GB1248857A (en) An audio-frequency dynamic sound range compressor
GB618789A (en) Improvements in or relating to electronic amplifying circuits
GB1161002A (en) Improvements in and relating to Hearing Aids
GB605811A (en) Improvements in or relating to circuit arrangements for amplifying high-frequency electrical oscillations
GB996579A (en) Improvements in directional sound-receiving apparatus
GB300252A (en) Improvements in or relating to circuit arrangements suitable for biassing electrostatic loud speakers
GB1342109A (en) Thin film transistor phongraph amplifier
GB473437A (en) Improvements in or relating to means for effecting tone compensation in loud speakers
GB507712A (en) Improvements in or relating to the remote control of wireless sets
US3342924A (en) Transistor circuit providing vibrato effects for electrically operated musical instruments
JPS5439624A (en) Diaphragm for speakers
GB506765A (en) Improvements in or relating to amplifiers for electrical signalling systems
GB1044461A (en) Improvements in and relating to transistor amplifiers
GB543388A (en) Improvements in installations for conversation in both directions between two points
GB725174A (en) Circuit arrangement for influencing the frequency response of a.f.-amplifiers
GB638484A (en) Improvements in or relating to hearing aids for deaf persons