Using a hot-wire anemometer for measurement of characteristics of a random acoustic field in compressible flows

The problem of interpretation of hot-wire measurements of acoustic fields in compressible flows is considered. Relations between mass-flow and total-temperature fluctuations registered by a hot-wire anemometer and pressure and velocity fluctuations are found. The relations obtained are applicable in the general case for measurement of resultant acoustic fluctuations at some point of the flow, which are generated by arbitrary distributed sources of sound with prior-unknown properties.