Sound field separation with sound pressure and particle velocity measurements

Sound field separation with sound pressure and particle velocity measurements.

In conventional near-field acoustic holography (NAH) it is not possible to distinguish between sound from the two sides of the array, thus, it is a requirement that all the sources are confined to only one side and radiate into a free field. When this requirement cannot be fulfilled, sound field separation techniques make it possible to distinguish between outgoing and incoming waves from the t...

A sound field separation technique based on measurements with pressure-velocity probes

A sound field separation technique based on measurements with pressure-velocity probes (L).

It has recently been shown that statistically optimized near field acoustic holography based on measurement with an array of pressure-velocity transducers makes it possible to distinguish between sources on the two sides of the array and thus suppress the influence of a disturbing source [F. Jacobsen and V. Jaud, J. Acoust. Soc. Am. 121, 1550-1558 (2007)]. However, the suggested technique uses ...

Separation of non-stationary sound fields with single layer pressure-velocity measurements.

This paper examines the feasibility of extracting the non-stationary sound field generated by a target source in the presence of disturbing source from single layer pressure-velocity measurements. Unlike the method described in a previous paper [Bi, Geng, and Zhang, J. Acoust. Soc. Am. 135(6), 3474-3482 (2014)], the proposed method allows measurements of pressure and particle velocity signals o...

Conversion of reproduced sound field based on the coincidence of sound pressure and direction of particle velocity

Several new sound systems have been proposed to provide an enhanced spatial impression in comparison with 5.1 surround sound. Such systems require more loudspeakers than the 5.1 system to deliver a superior sound impression, but it may be difficult to set up these systems into the typical home environment. This paper describes a new method for converting the signal of the original sound system ...