Identification of Noise Sources by Using Sound Intensity Measurement.

Identification of static distortion by noise measurement

ELECT Many active devices exhibit gross nonlinearity, which is traditionally mitigated using negative feedback. In those cases where negative feedback is not desired, compensation for the distortion can be carried out at the postprocessing stage by inverting the transfer function of the device. A new technique is demonstrated where the inherent noise in the system is exploited to estimate the r...

Detection and Recognition Threshold of Sound Sources in Noise

This study examines detection and recognition thresholds for environmental sounds in the presence of noise, with and without specific expectations about the targets. Human listeners were presented with a selection of everyday sounds masked by noise at initially increasing and later decreasing local signal-to-noise ratios. Participants had to indicate if they either detected or recognized the so...

A note on measurement of sound pressure with intensity probes

A comparison of two different sound intensity measurement principles

Identification and Reduction of Rotary Compressor Pure Tone Noise Sources Using Random Noise Excitation

Sources of noise at discrete frequencies in compressors may be gener ated by acoustic energy in the discharge pulse exciting mechanical or aco ustic resonances within the compressor assembly. In this case history, a known noise source was used in the vicinity of the discharge port to excite those resonances in a bench-type test where they could be easily identified . This test could be run in a...