This improved circuit incorporates a DSP (digital signal processor) with a 40KHZ ultrasonic parametric array. By adding compression and equalization, the quality of the audio signal is greatly improved.
This audio or video has not been edited. You are hearing and seeing the results of parametric sound waves
The ADAU1701 DSP chip processes the incoming audio signal. Compressors, limiters, EQs, bandpass filters and many other post processors can be added easily using the programming tool kit available from Analog Devices.