Title:
SPEAKER MINIMUM RESONANCE FREQUENCY MEASUREMENT DEVICE, SPEAKER SYSTEM, AND SPEAKER MINIMUM RESONANCE FREQUENCY MEASUREMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2020/158195
Kind Code:
A1
Abstract:
A sine wave output unit 2 (audio output unit) outputs an audio signal of a certain frequency to a speaker (10). A sound pickup unit (3) picks up audio outputted from the speaker (10). A signal output control unit (41) controls the frequency of audio signal to be outputted by the speaker (10) and the presence/absence of signal output. A frequency measurement unit (43) measures the frequency of the audio picked up by the sound pickup unit (3) after cessation of the audio signal that is outputted to the speaker (10). A determination unit (44) determines that the frequency of the audio signal is higher than the minimum resonance frequency of the speaker (10) when the measured frequency is lower than the frequency of the audio signal.
Inventors:
NAKAMURA MASAMI (JP)
Application Number:
PCT/JP2019/048212
Publication Date:
August 06, 2020
Filing Date:
December 10, 2019
Export Citation:
Assignee:
JVCKENWOOD CORP (JP)
International Classes:
G01R23/08; H04R3/04; H04R29/00
Foreign References:
| JPS5597800A | 1980-07-25 | |||
| JPS58132500U | 1983-09-07 | |||
| JPS55138618A | 1980-10-29 | |||
| JPS5599900A | 1980-07-30 |
Attorney, Agent or Firm:
MIYOSHI Hidekazu et al. (JP)
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