4 ms·
How is this not filtered out by a lowpass filter? Wouldn't this only block the ultrasonic beeps they embed in ads?
by steventhedev 7y ago
How is this not filtered out by a lowpass filter? Wouldn't this only block the ultrasonic beeps they embed in ads?
- QuarterDuplex 7y agoAssuming you mean a digital lowpass filter; this won't work. The ultrasonic input is saturating the microphone. In this situation, no amount of digital filters can recover the desired signal (the speech). If there was a physical low pass filter (not sure if these exist) that was placed over the microphone, that would work