Title:
NOISE LEVEL METER
Document Type and Number:
WIPO Patent Application WO/2023/120332
Kind Code:
A1
Abstract:
First, a correction amount h corresponding to a current output value of an atmospheric pressure sensor 24 is identified on the basis of information relating to the correction amount corresponding to an atmospheric pressure characteristic unique to a type of microphone 12, stored in advance in a correction information storage unit 34. Next, filters having A, C, and Z frequency weighting characteristics are applied to each individual input signal sampled during a time T, and a prescribed evaluation value deemed necessary to evaluate an acoustic pressure level is calculated on the basis of the output of each filter. Then, each evaluation value before and after dB conversion is corrected using the correction amount h, and each evaluation value after correction is output.
Inventors:
IGARASHI TATSUYA (JP)
MORIKAWA MASATO (JP)
SATO NARU (JP)
MORIKAWA MASATO (JP)
SATO NARU (JP)
Application Number:
PCT/JP2022/046086
Publication Date:
June 29, 2023
Filing Date:
December 14, 2022
Export Citation:
Assignee:
RION CO (JP)
International Classes:
G01H3/00
Foreign References:
| CN108827456A | 2018-11-16 | |||
| JP2018046333A | 2018-03-22 | |||
| JP2008026242A | 2008-02-07 | |||
| CN202974425U | 2013-06-05 | |||
| CN104897275A | 2015-09-09 | |||
| CN110160640A | 2019-08-23 |
Attorney, Agent or Firm:
KOH-EI, P.C. (JP)
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