Patent ID: 8693705
Filing Date: 2014-04-08
Classification: H04R,H04S

Abstract:
1. A response waveform synthesis method comprising: an inverse FFT step, performed by a processor, of using frequency characteristics stored on a frequency characteristic storage, determined for individual ones of a plurality of analyzed bands divided from a predetermined audio frequency range, to set a plurality of synthesized bands in such a manner that each of the synthesized bands is set by using two frequency characteristics respectively of two adjoining analyzed bands of the plurality of analyzed bands, the two frequency characteristics determined respectively through two different frequency resolution values, and in such a manner that a part of each synthesized band overlaps with a part of another adjoining synthesized band on a frequency axis and then determining a time-axial response waveform for each of the synthesized bands, said frequency characteristics being determined, for the individual analyzed bands, with frequency resolution that becomes finer in order of lowering frequencies of the analyzed bands; and an additive synthesis step, performed by the processor, of adding together the response waveforms of the synthesized bands, to thereby provide a response waveform for a whole of the audio frequency range.