Audio Eavesdropping Device

RF Wireless Eavesdropping Devices - MES Innovations

http://www.mesinnovations.com/devices/rfwireless.html#:~:text=Introduction%20to%20the%20wireless%20audio%20eavesdropping%20device%20The,that%20information%20can%20be%20directly%20monitored%20and%2For%20recorded..

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RF Wireless Eavesdropping Devices - MES Innovations

http://www.mesinnovations.com/devices/rfwireless.html

Eavesdropping Devices: The Truth About Hidden Microphones ...

http://bugdetectorfinder.com/eavesdropping-devices-the-truth-about-hidden-microphones/

One of the most common types of eavesdropping devices in use today is the wireless transmitter which picks up sound via a hidden microphone and broadcasts it to a receiver using radio frequencies. These kinds of eavesdropping devices are relatively easy to uncover by conducting an rf detector sweep. However eavesdropping devices that do not emit radio waves are much …

Wide Angle Laser Audio Eavesdropping Device

https://web.wpi.edu/Pubs/E-project/Available/E-project-042507-082349/unrestricted/Laser_Audio_Bug.pdf

Eavesdropping on conversations using conventional microphones is often difficult due to the attenuation of acoustic waves over long distances. By using surfaces close to the speaker as the microphone and detecting changes in those surfaces from a distance, speech can be reproduced more accurately then using long range microphones.

5 effective devices to prevent eavesdropping

https://www.jammer-mart.com/article-effective-devices-to-prevent-eavesdropping.html

Listening devices - Detective store

https://www.detective-store.com/listening-devices-29

Audio Bugs - Detective store

https://www.detective-store.com/audio-bugs-226

Audio Jammer | Counter Surveillance Systems

https://www.brickhousesecurity.com/counter-surveillance/audio-jammers/

Audio Surveillance Laws by State:Everything You Need to …

https://www.upcounsel.com/audio-surveillance-laws-by-state/

Audio eavesdropping law? - DoItYourself.com Community Forums

https://www.doityourself.com/forum/electronic-home-security-systems-alarms-devices/584518-audio-eavesdropping-law.html

The addition of audio is covered under eavesdropping laws but no mention is made of the installer. It is definitely a gray area and it appears that you as an installer could be named in a court case.