(19)
(11) EP 0 744 881 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
09.06.1999 Bulletin 1999/23

(43) Date of publication A2:
27.11.1996 Bulletin 1996/48

(21) Application number: 96303604.1

(22) Date of filing: 21.05.1996
(51) International Patent Classification (IPC)6: H04R 5/033
(84) Designated Contracting States:
DE FR GB

(30) Priority: 22.05.1995 JP 148323/95

(71) Applicant: VICTOR COMPANY OF JAPAN, LTD.
Yokohama-Shi, Kanagawa-Ken (JP)

(72) Inventors:
  • Okada, Toshikazu
    Kawasaki-shi, Kanagawa-ken (JP)
  • Suzuki, Takuma
    Yokosuka-shi, Kanagawa-ken (JP)
  • Matsumoto, Mitsuo
    Yokosuka-shi, Kanagawa-ken (JP)

(74) Representative: Crawford, Andrew Birkby et al
A.A. THORNTON & CO. Northumberland House 303-306 High Holborn
London WC1V 7LE
London WC1V 7LE (GB)

   


(54) Headphone reproducing apparatus


(57) A headphone reproducing apparatus creates a virtual sound. A listener feels as if a sound came from a virtual sound source that imaginarily exists in a space apart from the listener. A delay circuit delays a first-channel input audio signal and a second-channel input audio signal by predetermined delay times. A low-pass filter changes frequency characteristics of the first- and second-channel input signals to predetermined frequency characteristics. A multiplier changes sound levels of the first- and second-channel input audio signals to predetermined sound levels. The delay circuit, low-pass filter, and multiplier are connected in series to each other. A headphone reproduces the first- and second-channel input signals processed by the delay circuit, low-pass filter, and multiplier as the sound that comes from the virtual sound source.






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