Sound field control system, analysis device, and accoustic device

An analysis device comprising:

• a sound pickup unit which picks up a sound including a test sound sequence emitted from a speaker based on a test signal sequence, using a microphone;
• and
• an initial test sound pickup time determination unit which, from a sound pickup result from the sound pickup unit, determines a sound pickup time of an initial test sound among test sounds included in the test sound sequence,
• wherein the initial test sound pickup time determination unit detects the initial sound from a sound pickup signal picked up with the microphone, determines whether a sound has been detected after the elapse of a sound emission interval, from the sound pickup time of the detected initial sound, between the initial test sound defined by the test signal sequence and an n-th (where n is an integer such that n≧2) test sound emitted from the same speaker as the initial test sound, and, upon determining that the sound has been detected, determines the sound pickup time of the initial sound as the sound pickup time of the initial test sound.

An acoustic device comprising:

• a signal supply unit which supplies a test signal sequence to a speaker;
• and
• an initial test sound pickup time determination unit which, from sound pickup result of picking up a sound including a test sound sequence emitted from the speaker based on the test signal sequence using a microphone, determines a sound pickup time of an initial test sound among test sounds included in the test sound sequence,
• wherein the initial test sound pickup time determination unit detects the initial sound from a sound pickup signal picked up with the microphone, determines whether a sound has been detected after the elapse of a sound emission interval, from the sound pickup time of the detected initial sound, between the initial test sound defined by the test signal sequence and an n-th (where n is an integer such that n≧2) test sound emitted from the same speaker as the initial test sound, and, upon determining that the sound has been detected, determines the sound pickup time of the initial sound as the sound pickup time of the initial test sound.