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Listen Through Advanced Hearing Protection with Sound Dosimeter


  • Wired Two-Way-Radio Monitoring
  • Stereo Listen-Through


  • Watertight (IP-66)
  • Cold Weather (-30°C)
  • Hearing Protection (24dB NRR)
  • Personal Noise Dosimeter
  • Over/Behind Head, or Hard Hat
  • All Work Week Battery, 44 Hrs
  • USB Programmable
  • High Tech Features, Easy to Use
  • Description
  • Features
  • Specifications
  • Video
  • Documents

Delivering day-long comfort and rugged, anywhere performance, the Sonetics APX372 Listen-Through Advanced Hearing Protector with personal sound dosimeter shields you from dangerous noise levels while enhancing other audio to comfortable listening levels. Conserve your hearing without sacrificing safety and situational awareness. Stereo Listen-Through lets you hear alarms or have a face-to-face conversation without removing your hearing protection. Connect your portable two-way-radio, cell phone or listen to an MP3 player via the wired auxiliary input. Watertight and verified and validated to perform in extreme environments, the APX372 protects your hearing while you get the job done.

PR-Adapter to any portable two-way-radio
– Stereo Listen-Through with users not on the same network

Stereo Listen-Through – We’ve found the most common issue with hearing protection is the isolation users feel when wearing them. We added Stereo Listen-Through to all of our Apex 3-Series headsets to enable users to gain critical situational awareness.
24dB NRR – With 24dB of certified NRR protection, the Apex 3-Series are ready to go where you need to be.
Personal Sound Dosimeter – Hearing protection is nothing if it’s just a guess. This is why we added a personal sound dosimeter to every Apex 3-Series headset. Know you are wearing the headset correctly and have the protection.
Active Sound Management – We manage sounds from all communication sources to ensure optimal clarity and protection. This is done with the noise canceling and auto-leveling microphone, automatic loud noise suppression, and personal sound dosimeter with automatic input gain adjustments.

We know your job may take you anywhere, so we designed our headset to go anywhere you do.
Marine – Sealed against salt spray and moisture.
Winter – Operation down to -22°F (-30°C).
Summer – Operation up to 158°F (70°C).
Accident – Drop tested to 13 feet (4m).
Cleanliness – Easy to clean surfaces.

Silicone Ruggedizers – Know at a glance who is who on the job. Define teams, roles, communication profiles or individuals. Adds extra impact protection and abrasion resistance.
Headset Ruggedizer Colors

Model Description Mic Bluetooth DECT7
APX379 Wireless DECT7 Bluetooth Headset
APX377 Wireless DECT7 Headset
APX375 Wireless Bluetooth Headset
APX373 Radio Transmit Headset
APX372 Listen-Through Hearing Protector
adjustable volume control Adjustable Volume Control – Programmable and real-time adjustable user volume control. Returns to the last setting at power-up.
automatic loud noise suppressoin Automatic Loud Noise Suppression – Limits high impulse sounds such as gun shots when using the Stereo Listen-Through feature.
convertible headband Convertible Headband – User-configurable for overhead, behind-head, or hard hat (with hard hat accessory). Change the way you wear your headset from one job to the next.
color ruggedizer Silicone Ruggedizers – Define teams or roles, and enhance safety. Adds additional abrasion and impact protection. Available in many standard and custom colors (sold separately).
extreme environmental design Extreme Environmental Design – With an IP-66 dust and water ingress protection rating, Apex 3-Series headsets continue working even when hit with a fire hose, worn in a downpour or left out in the dust and sun of a job site. Verified operation to -22°F (-30°C) for extreme cold weather environments.
Hearing Protection – Conforms to many of the required hearing protection standards protecting the user from harmful noise.
in headset charging In Headset Charging – Charge from multiple sources, including the supplied AC wall adapter. DC charging from most cars, trucks, and aircraft. Refer to specifications for charging voltages and power requirements.
lightweight Light Weight – Use of the latest weight saving technologies delivers a wireless headset that is lighter than many wired communication headsets.
listen through situational awareness Listen-Through Situational Awareness – Stereo Listen-Through microphones give the wearer full situational awareness. Microphones placed on the forward edge of each ear dome provide the perception of sounds in the front versus from the rear. The Listen-Through feature has an independently adjustable volume level and automatically limits all sounds to a maximum of 82dB.
long battery life 44hr Long Battery Life – Over 44 hours of battery life on Apex 3-Series Personal Headsets means they are ready to work whenever you need them.
multilingual voice prompts Multilingual Voice Prompts – Hear voice prompts in your preferred language. Ships with American English installed. Spanish available as a factory-installed option.
multimode auto shutdown Multimode Auto Shutdown – Extends battery life. All shutdown timers have a voice prompt announcement and may be cancelled by pressing any button.
personal sound dosimiter Personal Sound Dosimeter – Measures and records sound levels inside the ear cup cavity over a period of up to 24 hours to ensure compliance with noise exposure limits. Remembers the Time Weighted Average even when turned off (the memory will reset after being turned off for 6 hours), and will average the last 24 hours continuously. Programmable audible alerts send a voice prompt to the user notifying them of the last 24 hours of exposure. The system automatically adjusts the various inputs (listen thru, AUX, Bluetooth, and side tone) to ensure compliance with hearing protection standards. For reference use only.
radio ptt Radio Monitoring – The headset interfaces with any two-way portable radio using the wired AUX input connection.
two stage low battery alert Two Stage Low Battery Alert – Notifies the user at 25-50% battery level, and again at <25%.
usb programable USB Programmable – The headset has a built in USB port to configure your headset with a Windows PC. Many of the features may be customized and saved from the program. Refer to the Sonetics Headset Program for details.
user replaceable battery User Replaceable Battery – The powered headset uses a replaceable battery. This allows the user to replace the battery at end of life and have spares in the field for extended operation times.
voice prompts Voice Prompts – The voice guided menu prompt system allows the user to make all adjustments without removing the headset. There is no need to look for lights, text, or knob positions. The voice prompts automatically adjust volume to ensure intelligibility in changing environments.
wired line in Wired Line-in – Connect to cell phones, handheld radios and other mobile devices. The wired connection features a mono input. See your Sonetics dealer for accessories to match your equipment.


Over Head: 15.8oz / 448g | 17.8oz / 504g with Ruggedizers
Behind Head: 16.2oz / 458g | 18.1oz / 514g with Ruggedizers

Battery: 3.7V rechargeable lithium ion
Battery Life: >44 hours @ 25°C
Protection: Over voltage, under voltage, over current and over temperature protection
AC Charge source: Supplied 12VDC, 500mA wall charger
DC Charge source: 5VDC to 16VDC, 0.5A minimum
Charge Time: <4 hours for fully discharged battery

Operating temperature: -22°F to 140°F / -30°C to 60°C
Storage temperature: -4°F to 122°F / -20°C to 50°C
Charging Temperature: 32°F to 113°F / 0°C to 45°C
IP-Rating: IP-66

FCC Part 15

Conducted Transients: 7637-2
Quality Management System Control: ISO 9001:2015

Chemical Exposure: Intermittent Exposure MIL-STD 810 Method 504:
Isopropyl alcohol, Formula 409®, WD-40®, Windex®, Bleach/Water (1:1), Mineral oil, Synthetic Sweat, Jet A Fuel, Kerosene, Gasoline, Deicing (Ethylene or Propylene Glycol mixtures), Potassium-Acetate based solution, Ansulite.
Humidity: MIL-STD 810F and 810G
Temperature Shock: MIL-STD 810F and 810G

Behind Head NRR Rating: 24dB
Over Head NRR Rating: 24dB

Patents Pending

Conducted Immunity: J1113-11
Electrostatic Discharge: J1113-13
Radiated Emissions: CISPR 25
Radiated Immunity: ISO 11452-2
Salt Spray: J1455, Sec. 4.3
Vibration: J1455 Sec. 4.9

UL1642 Standard for Lithium Batteries

UN38.3 UN Transportation Testing for Lithium Batteries

How-To Videos: Apex 3-Series Wireless Headsets

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