Sound recording device

摘要

A sound recording device of the present disclosure is can be connected with an external sound pickup device. The sound recording device includes a connector having a plurality of terminals to which the external sound pickup device can be connected, and a determiner that determines a type of the external sound pickup device when the external sound pickup device is connected to the connector, based on a correlation between signals of specific terminals out of the plurality of terminals.

主权项

1. A sound recording device to which an external sound pickup device can be connected, the sound recording device comprising:
a connector having a plurality of terminals to which the external sound pickup device can be connected; and a determiner that determines a type of the external sound pickup device when the external sound pickup device is connected to the connector, based on a correlation between signals of specific terminals of the plurality of terminals, the signals being signals changing temporally while the external sound pickup device is connected to the connector, the plurality of terminals include a first terminal and a second terminal, wherein the determiner is configured to determine the correlation between the signals by comparing a first value concerning an output signal of the first terminal and a second value concerning an output signal of the second terminal, wherein the first and second values are obtained by Formula 2, the parameter x is the voltage at the respective one of the first and second terminals, the parameter t represents time, the parameter T1 represents a first duration, and the parameter T2 represents a second duration.f⁡(x⁡(t))=1T1⁢∫t1t1+T1⁢x⁡(t)-1T2⁢∫t2t2+T2⁢x⁡(t)⁢⁢ⅆt⁢⁢ⅆt.[Formula⁢⁢2]