1. ANSI/ASA S1.4 (1983, R1994). Specification for sound level meters.
2. ANSI/ASA S1.4 (2014). Specification for sound level meters.
3. ANSI S3.1:1999 (R2018). Maximum permissible ambient noise levels for audiometric test rooms.
4. ANSI/ASA S3.6:2018. Specification for Audiometers.
5. Bruel and Kjaer (2022). Can pressure-field microphones be used in random and free fields? https://www.bksv.com/en/Campaign/HQ/M1-newsletters/M1-oct-2020/pressure-field-microphones. Accessed July 30, 2022.