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PD ISO/TS 20065:2022 Acoustics. Objective method for assessing the audibility of tones in noise. Engineering method, 2023
- undefined
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Measurement procedure [Go to Page]
- 4.1 General
- 4.2 Measurement instruments
- 4.3 Merging the basic spectra
- 5 Evaluation [Go to Page]
- 5.1 General information
- 5.2 Width, Δfc, of the critical band
- 5.3 Determination of prominent tones [Go to Page]
- 5.3.1 General information
- 5.3.2 Determination of the mean narrow-band level, LS, of the masking noise in the critical band
- 5.3.3 Determination of the tone level LT of a tone in a critical band
- 5.3.4 Distinctness of a tone
- 5.3.5 Determination of the critical band level, LG, of the masking noise
- 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
- 5.3.9 Determination of the mean audibility, ΔL, of a number of spectra
- 6 Calculation of the uncertainty of the audibility, ΔL
- 7 Recommendations on the presentation of results [Go to Page]
- 7.1 Measurement
- 7.2 Acoustic environment
- 7.3 Instruments for measurement, recording and evaluation
- 7.4 Acoustic data
- Annex A (informative) Window effect and Picket fence effect
- Annex B (informative) Resolving power of the human ear at frequencies below 1 000 Hz and geometric position of the critical bands – corner frequencies
- Annex C (informative) Masking, masking threshold, masking index
- Annex D (informative) Iterative method for the determination of the audibility, ∆L
- Annex E (informative) Example for the determination of audibility
- Bibliography [Go to Page]
