To suppress the power consumed by a circuit that drives an electrostatic transducer.

In a period t1 where a second signal outputted from a second oscillator 121 is an H level, a switch section 160 supplies an AC first signal outputted from a first oscillator 120 to a DC signal generating section 111. The DC signal generating section 111 rectifies and steps up the supplied first signal and outputs a DC third signal. In a period t2 where the second signal is an L level, the switch section 160 electrically disconnects between the first oscillator 120 and the DC signal generating section 111. In the period t1, the third signal outputted from the DC signal generating section 111 is supplied to a vibrating body 10 via a diode D1 and a resistor R13, and in the period t2, the third signal is not supplied from the DC signal generating section 111. In other words, since a DC voltage (bias voltage) is intermittently supplied to the vibrating body 10, the consumption power of a driver circuit 100 reduces.