Patent ID: 8953821
Filing Date: 2015-02-10
Classification: B06B,G10K,H04R,H04S

Abstract:
1. A method of broadening a frequency response of an acoustic transducer array, comprising the steps of: providing an acoustic transducer array including a backplate having a surface and a series of depressions formed on the surface, and a membrane with at least one conductive surface disposed adjacent the backplate, wherein the respective depressions have one or more variable dimensions, wherein the membrane and the series of depressions define a plurality of acoustic transducers, and wherein the plurality of acoustic transducers have a plurality of associated center frequencies, respectively, the plurality of associated center frequencies being determined at least in part by the variable dimensions of the respective depressions; for each of at least some of the plurality of acoustic transducers, determining the center frequencies of the respective acoustic transducers, including setting the variable dimensions of the respective depressions such that the plurality acoustic transducers define by the membrane and the series of depressions include at least one first acoustic transducer having at least one first specified center frequency followed by at least one second acoustic transducer having at least one second specified center frequency; and spacing the at least one first specified center frequency of the at least one first acoustic transducer and the at least one second specified center frequency of the at least one second acoustic transducer apart to span a predetermined frequency range, thereby broadening the frequency response of the acoustic transducer array.