Listen-through-walls stethoscopes are specialised systems designed for discreet
acoustic monitoring
through solid structures. By capturing micro-vibrations and near-field audio
transmitted through
walls, doors, windows, ceilings and floors, operators can monitor speech,
movement
and structural activity with high sensitivity.
Contact-based sensing for low-visibility acoustic capture through solid surfaces.
Options for stereo monitoring, recording and DSP processing to improve intelligibility.
Operator-focused designs with robust housings and field-ready workflows.
Models & Key Features
MGT SS27-MKII — Stereo Stethoscope
New productPreliminary technical informationIn stock
The SS27-MKII Stereo Stethoscope is an advanced listen-through-walls
platform
designed for discreet acoustic monitoring through solid structures. This upgraded version
offers a simple and intuitive user interface, requiring minimal adjustments to deliver
optimal performance across a variety of modes and operating environments.
Effective through-wall acoustic monitoring demands precise engineering across the entire
signal chain. In field conditions, microphone placement and wall materials can generate
wide level variations. For this reason, the system integrates a powerful analogue compressor
and noise gate stages to reduce the need for continuous adjustments and to help protect
the operator’s hearing.
Key features
Very high sensitivity and low distortion with custom M&G contact microphones.
Compact and robust design with straightforward operation.
Fully analogue architecture with low power consumption.
Independent compression and noise gate functions for each channel (stereo) or mono (L+R)
mode.
High-slope high-pass filtering to reduce mains-related noise and low-frequency rumble.
Embedded rechargeable lithium battery with USB-C internal charging.
The MGT SST-44 is a portable digital stethoscope platform engineered for
high sensitivity
and clear monitoring in demanding environments. Its dual-channel architecture supports
advanced operation,
with integrated processing designed to improve clarity and reduce ambient noise.
Key features
Waterfall-style visualisation and support for digital sensors.
Optional 5G streaming with EBU connection (configuration dependent).
Bluetooth data transfer with line and dial generator functionality.
Two-channel design for enhanced monitoring performance.
High-sensitivity capture with crystal-clear audio output.
DSP processing for equalisation and ambient noise reduction.
Compatible with both analogue and digital sensors.
Real-time monitoring with recording and streaming capability.
Lightweight aluminium central frame for robust handling.
The MGT SST-33 is a professional stereo digital recordable
stethoscope
equipped with a USB port, supporting documentation and post-analysis
workflows for
listen-through-walls applications.
The platform integrates a high-reliability DSP processing chain designed to
condition
and stabilise the signal. Two highly sensitive accelerometers capture subtle vibration
patterns generated
by sound waves through solid structures.
The stereo amplifier enhances low-level signals, enabling monitoring via headphones or a
line output
for recording workflows.
The MGT SS-27 is engineered for discreet listening through solid structures
including
walls, ceilings, windows, doors and floors. Designed for field use, it
combines portability
with straightforward front-panel control for rapid deployment.
Key features
Powered by 4 × AA batteries for strong signal-to-noise performance.
Front-panel controls for balance, volume and attenuation.
Low-battery and voltage LED indicators.
Compact form factor for mobile and close-target work.
The MGT STV-2 is a high-performance stereo stethoscope amplifier engineered
for use with
contact microphones and impact sound sensors (CM, KM and BK/KD series). Built for precision
acoustic monitoring,
it supports detection, monitoring and recording of analogue audio signals including speech,
subtle movements and
structural vibration events.
The system uses an ultra-low-noise amplification chain designed to minimise interference and
amplify even weak
acoustic signals with high clarity, supporting demanding surveillance workflows.
Key features
Independent channel configuration: threshold frequencies, gain levels and microphone
input selection.
Continuously variable gain with real-time clip indication to prevent overload and
distortion.
Dual-channel monitoring: Channel 1, Channel 2, or both simultaneously.
Dedicated NF outputs for recording, analysis and documentation.
Supply is limited to qualified government, defence and law-enforcement clients or accredited partners.
End-use and export controls may apply. We provide discreet delivery, operator training and lifecycle
support.
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