Title:
NOISE AMOUNT JUDGING SYSTEM
Document Type and Number:
Japanese Patent JPH05248933
Kind Code:
A
Abstract:
PURPOSE:To judge properly the degree of noise component relative to the audio component included in the sounds in an acoustic field. CONSTITUTION:Sounds in an acoustic field, for example in a car, are sensed by an intra-car sound sensing part 11, and a correlation coefficient calculating part 17 takes in the middle-range component of the intra-car sound sensing signal DS at the specified sampling intervals, takes in the middle-range component of the audio signal AS emitted by an audio apparatus 14 at sampling intervals, and calculates the correlation coefficient (r) between the two for every specific number of sampling. This correlation coefficient is entered into a sound quantity correction value determining part 18 as a factor representing the degree of noise relative to the audio component contained in the intra-car sounds. The correction value determining part 18 determines the sound quantity correction value Z of an applicable audio appliance on the basis of this value of correlation coefficient to automatically correct the sound quantity of the audio appliance.
Inventors:
WATANABE YOSHIKATSU
MIYAKE TAKASHI
ITO MASATOSHI
IMANISHI SADAO
MIYAKE TAKASHI
ITO MASATOSHI
IMANISHI SADAO
Application Number:
JP4536392A
Publication Date:
September 28, 1993
Filing Date:
March 03, 1992
Export Citation:
Assignee:
ALPINE ELECTRONICS INC
International Classes:
G01H3/00; G01H17/00; H04R3/00; (IPC1-7): G01H3/00; G01H17/00; H04R3/00
Attorney, Agent or Firm:
Chika Saito