4 ms·
Ultrasonic buzzers? I kinda fail to see how that would help, shouldn't be too hard to filter out the ultrasonic range noise.
by jascii 6y ago
Ultrasonic buzzers? I kinda fail to see how that would help, shouldn't be too hard to filter out the ultrasonic range noise.
- Zenst 6y agoBasically drowns out the room vibrations upon the window as it is a in direct contact. You can make your own with piezo discs and small circuit to drive them. That and high frequency will not cause added noise noticeable to humans.
- noir_lord 6y agoNot if it's random. It's the vibrations from sound on glass they want and those are tiny by comparison to the input.