1969-02-01

Nonuniformities of Reverberant Sound Fields and Their Implications for Sonic Test Specification 690617

Nonuniformities of sound level occur in all reverberant rooms including those used in sonic testing. A theory is presented which describes these variations statistically in terms of analysis bandwidth and room reverberation time. The theory applies above a certain cutoff frequency and in regions remote from room boundaries. These nonuniformities produce uncertainty in the room averaged sound spectrum levels leading to potentially serious risk of undertest or overtest. A methodology is proposed whereby the risk of any degree of undertest or overtest can be predicted and controlled in advance. The methodology employs hypothesis testing applied to the known statistics of the sound field.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.
X