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Title:
ACOUSTIC DEVICE FOR VEHICLE
Document Type and Number:
Japanese Patent JP2017041752
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an acoustic device for vehicle that suitably reduces influence of wind noise.SOLUTION: An acoustic device for vehicle comprises: sound information acquisition means 110 for acquiring information on sound around a vehicle; first high-pass filter means 130 for performing high-pass filter processing based on a first cut-off frequency on the information on sound to output a pre-processed signal; wind speed estimation means 150 for estimating wind speed corresponding to wind noise included in the information on sound, on the basis of the degree of agreement of components in frequencies equal to or lower than the first cut-off frequency between the pre-processed signal and a previously stored wind noise sample signal for each wind speed; cut-off frequency setting means 160 for setting a second cut-off frequency on the basis of the wind speed; and second high-pass filter means 170 for performing high-pass filter processing based on the second cut-off frequency on the information on sound to output a wind noise reduction signal in which the wind noise has been reduced.SELECTED DRAWING: Figure 1

Inventors:
KAWASE HISASHI
MIMA NORIO
KAWAMATA SHINYA
NAGATA SHINICHI
Application Number:
JP2015162302A
Publication Date:
February 23, 2017
Filing Date:
August 19, 2015
Export Citation:
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Assignee:
NIPPON SOKEN
TOYOTA MOTOR CORP
International Classes:
H04R3/00; B60R1/12; B60R11/02; G10K11/178
Attorney, Agent or Firm:
江上 達夫
山本 晃司
中村 聡延