With a parabolic dish, you control directionality with the size of the dish.
Can A Parabolic Microphone Hear Through Walls. Parabolic directional microphone is a spy gadget use to listen through walls or from a distant place to a discreet conversation. Apart from bugs in the same room, can a parabolic mic achieve that (ie hearing you.
Audio Listening Device Listen Through Walls from www.spygadgets4u.co.uk
The ultimate professional listen through wall system that can hear sound through concrete, metal, wood, brick in fact any solid surface. The gain had to be cranked so much on the. Shotgun microphone project kit build your own also shows a stethescopic sound and vibration detector for listening through walls, etc.
You will also need microphones.
Hear distant sounds that are up to 100 yards away. Monitoring and protection of the building. Allows to hear through walls. For a given wavelength, your first null in the response happens at an angle.
