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BSI PD ISO/TS 20065:2022 2023

BSI PD ISO/TS 20065:2022 2023

$167.15

Acoustics. Objective method for assessing the audibility of tones in noise. Engineering method

Published By Publication Date Number of Pages
BSI 2023 42
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PDF Catalog

PDF Pages PDF Title
2 undefined
6 Foreword
7 1 Scope
2 Normative references
3 Terms and definitions
12 4 Measurement procedure
4.1 General
4.2 Measurement instruments
4.3 Merging the basic spectra
5 Evaluation
5.1 General information
13 5.2 Width, Δfc, of the critical band
14 5.3 Determination of prominent tones
5.3.1 General information
5.3.2 Determination of the mean narrow-band level, LS, of the masking noise in the critical band
15 5.3.3 Determination of the tone level LT of a tone in a critical band
16 5.3.4 Distinctness of a tone
5.3.5 Determination of the critical band level, LG, of the masking noise
17 5.3.6 Masking index
5.3.7 Determination of the audibility, ΔL
5.3.8 Determination of the decisive audibility, ΔLj, of a narrow-band spectrum
19 5.3.9 Determination of the mean audibility, ΔL, of a number of spectra
6 Calculation of the uncertainty of the audibility, ΔL
22 7 Recommendations on the presentation of results
7.1 Measurement
7.2 Acoustic environment
7.3 Instruments for measurement, recording and evaluation
7.4 Acoustic data
23 Annex A (informative) Window effect and Picket fence effect
26 Annex B (informative) Resolving power of the human ear at frequencies below 1 000 Hz and geometric position of the critical bands – corner frequencies
28 Annex C (informative) Masking, masking threshold, masking index
29 Annex D (informative) Iterative method for the determination of the audibility, ∆L
33 Annex E (informative) Example for the determination of audibility
39 Bibliography

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BSI PD ISO/TS 20065:2022 2023
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