AHRI 250: Performance and Calibration of Reference Sound Sources

Standard Scope

​​​​This standard applies to all reference sound sources used in conjunction with AHRI sound rating standards and covers the one-third octave band frequency range from 50 to 10,000 Hz. This standard includes calibration over a limited frequency range 100 to 10,000 Hz.

Free Download

©2022 Air-Conditioning, Heating, and Refrigeration Institute