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ANSI/ASA S3.71-2019 American National Standard Methods for Measuring the Effect of Head-worn Devices on Directional Sound Localization in the Horizontal Plane >
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ANSI/ASA S3.71-2019 American National Standard Methods for Measuring the Effect of Head-worn Devices on Directional Sound Localization in the Horizontal Plane, 2019
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Subject qualifications
- 4.1 Test subjects
- 5 Test devices
- 5.1 Required number of head-worn device samples
- 5.2 Ambient listening gain setting
- 6 Sound field requirements
- 6.1 Defined head cylinder sound field
- 6.2 Loudspeakers
- 6.3 Loudspeaker obscuration
- 7 Facility requirements
- 7.1 Method 1 initial open-ear facility performance requirements
- 7.2 Test room open-ear baseline facility performance
- 7.3 Loudspeaker spacing
- 8 Procedures and analyses
- 8.1 Training
- 8.2 Stimuli presentation
- 8.3 Maintaining head location inside head cylinder
- 8.4 Order of test conditions
- 8.5 Front-back reversal error determination
- 8.6 Method 1 specific procedures
- 8.7 Method 2 specific procedures
- 8.8 Method 3 specific procedures
- 9 Uncertainty estimates and calculations
- 9.1 Method 1
- 9.2 Method 2
- 9.3 Method 3
- 10 Reporting requirements
- 10.1 Test facility
- 10.2 Facility performance
- 10.3 Subject information
- 10.4 Uncertainty analysis
- 10.5 Head-worn device
- ii © 2019 Acoustical Society of America – All rights reserved 10.6 Room information
- 10.7 Results
- Annex A (normative) Measurement of unity gain
- A.1 Gain setting for active head-worn devices
- Annex B (informative) Design guidelines for Method 1 acoustic spaces
- B.1 Loudspeakers
- B.2 Equalization
- B.3 Masking noise
- B.4 Reverberation time
- B.5 Ambient noise level
- B.6 Loudspeaker placement - Distance from walls and other reflecting surfaces
- Annex C (normative) Measurement of head dimensions, scaled photos of pinnae, and earcanal diameter
- C.1 Anthropometric measurements
- C.2 Scaled photo documentation of pinnae
- C.3 Measurement of earcanal diameter
- Annex D (informative) Method 4 to measure localization acuity
- D.1 Description of method
- D.2 Subject qualification
- D.3 Test device requirements
- D.4 Sound field requirements
- D.5 Facility requirements
- D.6 Method 4 specific procedures
- D.7 Method 4 uncertainty calculations
- D.8 Method 4 reporting
- Annex E (normative) Subject questionnaire (ANSI/ASA S3.71-2019
- Bibliography [Go to Page]
