Description

Claims

Drawing

Cited references

US5532438A	[0004]
US6556687B	[0007]  [0014]
US7146011B	[0007]  [0014]
WO200605938A	[0015]
US2004264707A	[0016]

Parametric Acoustic Array	[0005]
Possible exploitation of non-linear acoustics in underwater transmitting applications	[0005]
Active noise control using a steerable parametric array loudspeaker	[0017]
Ultrasonic Doppler Sensor for Voice Activity Detection	[0118]
Multimodal speech recognition with ultrasonic sensors	[0119]