| 摘要 |
PROBLEM TO BE SOLVED: To make possible leading tone quality from a physical characteristic of measured acoustic equipment by providing a tone quality operation means operating the tone quality based on the physical characteristic. SOLUTION: An analyzing signal outputted from a signal output means 1 is reproduced by a speaker 8 through an amplifier 7, and the reproduced analyzing signal is inputted to a signal input means 2 by a microphone 9 according to control of timing adjustment of a control means 3. A physical characteristic operation means 4 receives the signal inputted to the signal input means 2, and divides it first to bands at every one octave band width to operate an averaged sound pressure frequency characteristic at every band, and then, operates level differences between the mean sound pressure level of the whole band and the sound pressure levels of respective bands at every band. Then, a tone quality operation means 5 operates the tone quality from these level differences of respective bands according to a prescribed recurrence expression. |
