Audio system and related method integrated with ultrasound communication functionality

A device integrated with ultrasound/quasi-ultrasound communication functionality comprising:

• a signal processor, capable of modulating a communication signal to a ultrasound/quasi-ultrasound;
• and
• an acoustic transmitter, capable of transmitting an audio sound and the ultrasound/quasi-ultrasound, wherein a frequency of the ultrasound/quasi-ultrasound is higher than a frequency of the audio sound.

A device integrated with ultrasound/quasi-ultrasound communication functionality compromising:

• a microphone, capable of receiving an audio sound and a ultrasound/quasi-ultrasound, wherein the ultrasound/quasi-ultrasound carries a communication signal by modulation;
• and
• a signal processor, capable of demodulating the ultrasound/quasi-ultrasound to retrieve the communication signal.

A method capable of integrating communication functionality in an audio system, comprising:

• modulating a communication signal to a ultrasound/quasi-ultrasound;
• and
• transmitting the ultrasound/quasi-ultrasound and an audio sound with an audio transmitter, wherein a frequency of the ultrasound/quasi-ultrasound is higher than a frequency of the audio sound.