Audio and ultrasound signal processing circuit and an ultrasound signal processing circuit, and associated methods

Abstract

An audio and ultrasound signal processing circuit (412), comprising: an audio input terminal (414) for receiving an input signal comprising an audio input signal; an amplitude detector (430), configured to determine an amplitude of the input signal and provide an amplitude level signal (432); a gain calculator (434) configured to determine an ultrasound amplification factor (436) in accordance with the amplitude level signal (432) and a target amplitude signal (418); a variable ultrasound amplifier (438) configured to receive an ultrasound input signal and modulate an amplitude of the ultrasound input signal in accordance with the ultrasound amplification factor (436) in order to provide an amplified ultrasound signal; and an output terminal (416) for providing an enhanced output signal comprising frequency components that correspond to the audio input signal and frequency components that correspond to the amplified ultrasound signal.

Dependencies are inferred from the claim text.