BSI PD ISO/TS 20065:2022 – TC 2023

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

Published By	Publication Date	Number of Pages
BSI	2023	98

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PDF Catalog

PDF Pages	PDF Title
1	30468878
57	A-30456221
58	undefined
62	Foreword
63	1 Scope 2 Normative references 3 Terms and definitions
68	4 Measurement procedure 4.1 General 4.2 Measurement instruments 4.3 Merging the basic spectra 5 Evaluation 5.1 General information
69	5.2 Width, Δfc, of the critical band
70	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
71	5.3.3 Determination of the tone level LT of a tone in a critical band
72	5.3.4 Distinctness of a tone 5.3.5 Determination of the critical band level, LG, of the masking noise
73	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
75	5.3.9 Determination of the mean audibility, ΔL, of a number of spectra 6 Calculation of the uncertainty of the audibility, ΔL
78	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
79	Annex A (informative) Window effect and Picket fence effect
82	Annex B (informative) Resolving power of the human ear at frequencies below 1 000 Hz and geometric position of the critical bands – corner frequencies
84	Annex C (informative) Masking, masking threshold, masking index
85	Annex D (informative) Iterative method for the determination of the audibility, ∆L
89	Annex E (informative) Example for the determination of audibility
95	Bibliography