Comparison of annoyance of tones predicted from sound power versus sound pressure measurements

Abstract

ASHRAE 1707-TRP provides a means by which to predict the annoyance of tones in noise as related to building services equipment. The scope is limited to sound pressure measurements taken in a classroom, office, or other occupied space. However, product manufactures rely on sound power measurements taken in reverberation chambers to quantify noise emissions. This case study will show how sound power data taken in accordance with AHRI 260 performs in predicting tonal annoyance.