This Appendix is Mandatory
Rooms used for audiometric testing shall not have background sound pressure levels exceeding those in Table D-1 when measured by equipment
conforming at least to the Type 2 requirements of American National Standard Specification for Sound Level Meters, S1.4-1971 (R1976), and to the Class
II requirements of American National Standard Specification for Octave, Half-Octave, and Third-Octave Band Filter Sets, S1.11-1971 (R1976).
TABLE D-1 - MAXIMUM ALLOWABLE OCTAVE-BAND SOUND PRESSURE LEVELS
FOR AUDIOMETRIC TEST ROOMS
_______________________________________________________________
Octave-band center
frequency (Hz)............... 500 1000 2000 4000 8000
Sound pressure level (dB) ... 40 40 47 57 62
_______________________________________________________________
|