How quickly do the Allen Ultrx Bionic electronic ear muffs react to sudden loud noises like gunshots?

The Allen Ultrx Bionic ear muffs feature an ultra-fast attack time of 0.02 seconds (20 milliseconds). The dual hi-gain microphones automatically compress impulse noises reaching above 82 dB to protect your hearing while still allowing you to hear normal ambient sounds.

Can I connect my smartphone or two-way radio directly to these ear muffs?

Yes, model AL4147 includes a built-in 3.5mm auxiliary audio input jack for connecting external devices like mobile phones, portable audio players, or communication radios using an aux cord. Please note that this model uses a wired aux connection and does not feature built-in wireless Bluetooth capability.

Are these ear muffs suitable for indoor shooting ranges or large-bore magnum rifles in the Australian outback?

The Allen Ultrx ear muffs provide a Noise Reduction Rating (NRR) of 22 dB, which roughly corresponds to a Class 4 performance rating under Australian safety standards. While ideal for rimfire, standard shotguns, and open-field hunting, high-volume indoor ranges or large-bore centrefire and magnum calibres typically require higher NRR protection or dual protection with earplugs.

What type of batteries do the Allen AL4147 ear muffs require and are they included?

These electronic ear muffs operate on 2 standard AAA alkaline batteries. As batteries are not included in the packaging, you will need to supply your own prior to heading out to the shooting range or hunting trip.

Electronic Shooting Earmuffs - Allen AL4147

The Allen ULTRX™ Bionic Electronic Earmuff (Veil Tac Gray Camo) delivers dynamic sound suppression and ambient audio enhancement for field shooting and range training. Certified to ANSI S3.19 standards, the unit provides a 22 dB Noise Reduction Rating (NRR) using a low-profile folding design with a durable rubberized exterior shell. Symmetrical high-gain stereo microphones use dynamic wave compression and Studio Harmonics technology to pick up and amplify environmental sounds such as range commands and wildlife movement. When sound levels reach the 82 dB threshold, the electronic circuitry shuts off audio pass-through within 0.02 seconds (20 milliseconds) to protect against impulse noise damage from gunfire.

Key Features

Electronic Noise Compression: Automatically suppresses impulse sounds exceeding 82 dB in 0.02 seconds while maintaining ambient hearing awareness.
Certified Passive Protection: Delivers an ANSI S3.19-certified 22 dB Noise Reduction Rating (NRR) against continuous and impulse noise.
Stereo Microphone Array: Two high-gain microphones provide Studio Harmonics sound reproduction with symmetrical response for directional hearing.
External Audio Jack: Includes an integrated 3.5mm Aux input jack for wired connections to handheld two-way radios, mobile phones, or audio devices.
Padded Comfort Design: Outfitted with an adjustable extra-padded headband and pillow-foam ear cup cushions for sustained field use.
Battery Operation: Operates entirely on 2 × AAA alkaline batteries (not included) without requiring external chargers or mains power.

Specifications

Product Name: Allen ULTRX™ Bionic Electronic Earmuff
Model Number: AL4147 / 4147
Noise Reduction Rating: 22 dB NRR (ANSI S3.19)
Suppression Activation Threshold: 82 dB
Reaction/Attack Time: 0.02 seconds (20 ms)
Microphones: 2 × high-gain stereo microphones
Audio Input: 3.5mm Aux port
Power Supply: 2 × AAA batteries
Colour/Pattern: Veil Tac Gray Camo

Who is the Allen Ultrx Bionic Electronic Ear Muffs Veil Camo Grey 22nrr for?

Outdoor hunters requiring situational awareness — relies on twin high-gain microphones to amplify low-level environmental sounds while the electronic shooting earmuffs suppress gunshots above the 82 dB threshold within a 0.02-second attack time.
Clay target and sports shooters — provides continuous ANSI S3.19-certified 22 dB NRR hearing protection across extended shotgun courses while maintaining full conversational capability with squad members and range officers.
Tactical rifle and handgun trainees — integrates a dedicated 3.5mm Aux input jack to feed communication audio from external two-way radios directly into the electronic headset during live-fire drills.

Less suitable for: High-volume indoor shooting ranges or large-bore magnum rifle fire that exceeds the 22 dB NRR suppression envelope, where high-attenuation passive earmuffs (26–30 dB+ NRR) or dual-layer earplug systems are required, or for users seeking wireless Bluetooth connectivity rather than a wired 3.5mm Aux cord connection.

SKU	AL39963LP
Model #	AL4147
Brand	Allen
Shipping Weight	1.0000kg

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Allen Al4147 Electronic Earmuffs 22db Nrr Veil Camo

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