This highly sensitive wall contact amplifier and microphone can detect conversations through up to 30 cm of solid materials—including concrete walls, windows, and concrete or steel floors commonly found in apartments and offices.

The device comes complete with earphones, a wall contact microphone, and a recording socket for capturing audio. It features an ultra-sensitive stainless-steel ceramic microphone that delivers outstanding sound detection performance.

The magnetic base of the sensor includes a central needle that connects to the ceramic element, transforming even the slightest vibrations into clear electrical audio signals. These are then amplified for accurate listening.

An audio filter control is built in, allowing you to fine-tune the sound—enhancing or reducing specific frequencies for optimal clarity

For recording purposes, pairing the unit with our Digital Voice Recorder ensures excellent results.

Additional Applications:

Hidden Pipe / Leak Detection

Identify leaking water pipes or damaged plumbing inside concrete floors or behind walls by picking up the sound of flowing or dripping water transmitted through the structure.

Security & Surveillance

Monitoring remote rooms or offices for unauthorized access or activity without visible cameras or microphones.
Useful in commercial premises where audio monitoring through partitions is needed

Industrial / Manufacturing Monitoring

In factories or plants: place the sensor on machine enclosures to monitor for abnormal vibration/noise emanating from internal components without dismantling equipment.
Use it during preventive maintenance to detect bearing wear, loose panels, structural resonances.

Pest, Wildlife & Termite Activity Monitoring

Detect insects, rodents or other pests moving inside walls, ceilings or floors by listening for their activity via vibration of the structure.
Use in attics, crawlspaces or within cavity walls to pinpoint pest nests without fully opening the structure.

Search & Rescue / Emergency Use

In disaster scenarios (collapsed buildings, blockages) the wall-contact sensor could help detect trapped individuals behind debris or walls by listening for faint noises, tapping, movement. The description explicitly lists “Search & Rescue: Detect trapped individuals in basements, elevators, or beneath rubble.”
Use by rescue teams or safety crews in confined / hazardous areas.

Media & Film Production / Sound Engineering

For documentary makers or film crews: pick up low-audio, behind-the-scenes conversations or ambient room sound through partitions.

Microphones And Amplifiers