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GB1517938A - Headphone system - Google Patents

Headphone system

Info

Publication number
GB1517938A
GB1517938A GB51050/75A GB5105075A GB1517938A GB 1517938 A GB1517938 A GB 1517938A GB 51050/75 A GB51050/75 A GB 51050/75A GB 5105075 A GB5105075 A GB 5105075A GB 1517938 A GB1517938 A GB 1517938A
Authority
GB
United Kingdom
Prior art keywords
signal
stereophonic
delay
dec
related signals
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
GB51050/75A
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of GB1517938A publication Critical patent/GB1517938A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems
    • H04S1/002—Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution
    • H04S1/005—For headphones

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Stereophonic System (AREA)

Abstract

1517938 Stereophonic circuits MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 12 Dec 1975 [25 Dec 1974] 51050/75 Heading H4R In a stereophonic headphone system which simulates listening to stereophonic loudspeakers, each earphone receives, in addition to its own signal, a portion of the other signal of the stereophonically related signals after delay and filtering of said other signal. Stereophonically related signals from a source 1 are applied through adders 14, 15 and notch filters 16, 17 to earphones 8, 9 of a pair of headphones 7. Delay circuits 10,11 provide a delay (e.g. about 400 ÁS) and low pass filters 12, 13 have a cut-off frequency of 400 Hz or below and an attenuation characteristic of - 1À5 to - dB/oct. The notch filters compensate for a resonance effect due to the air volume in the user's auricle between the earphone and the eardrum.
GB51050/75A 1974-12-25 1975-12-12 Headphone system Expired GB1517938A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50002919A JPS5175429A (en) 1974-12-25 1974-12-25

Publications (1)

Publication Number Publication Date
GB1517938A true GB1517938A (en) 1978-07-19

Family

ID=11542750

Family Applications (1)

Application Number Title Priority Date Filing Date
GB51050/75A Expired GB1517938A (en) 1974-12-25 1975-12-12 Headphone system

Country Status (5)

Country Link
JP (1) JPS5175429A (en)
CA (1) CA1051350A (en)
DE (1) DE2557516C3 (en)
FR (1) FR2296340A1 (en)
GB (1) GB1517938A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136260A (en) * 1976-05-20 1979-01-23 Trio Kabushiki Kaisha Out-of-head localized sound reproduction system for headphone
DE2918776C2 (en) * 1979-05-10 1984-07-19 Kronester, Walter, Dipl.-Ing., 8000 München Circuit arrangement for adapting a room-related stereophonic program signal to free-field equalized headphones
DE2918831C2 (en) * 1979-05-10 1982-09-30 Institut für Rundfunktechnik GmbH, 8000 München Circuit arrangement for adapting a room-related stereophonic program signal to free-field equalized headphones
AT394650B (en) * 1988-10-24 1992-05-25 Akg Akustische Kino Geraete ELECTROACOUSTIC ARRANGEMENT FOR PLAYING STEREOPHONER BINAURAL AUDIO SIGNALS VIA HEADPHONES
DE69632889T2 (en) * 1995-05-22 2005-07-21 Victor Company of Japan, Ltd., Yokohama Player with headphones

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2244162C3 (en) * 1972-09-08 1981-02-26 Eugen Beyer Elektrotechnische Fabrik, 7100 Heilbronn "system

Also Published As

Publication number Publication date
DE2557516A1 (en) 1976-07-15
FR2296340A1 (en) 1976-07-23
FR2296340B1 (en) 1981-09-04
CA1051350A (en) 1979-03-27
DE2557516B2 (en) 1979-02-01
DE2557516C3 (en) 1979-09-20
JPS5175429A (en) 1976-06-30

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19921212