Specialized Target Optimization™ (STO) Technology

Meet the World’s first patented pursuit-based hunting programs designed to replicate the sounds of your specific hunt. This is the only industry patented sound technology that both enhances and protects.

Our hearing devices feature patent pending Specialized Target Optimization™ (STO). STO is the world’s first hearing technology that isolates and enhances the exact frequencies needed to improve hearing for your specific environment. We analyzed the acoustical properties of game vocalizations, calling, voices and shooting to develop this patent-pending sound processing system.

TETRA products instantly shut down and instantly recover for sudden loud noises, like gunshots, providing the wearer full protection at the very moment it’s needed. For more sustained loud inputs, AlphaShield Compression™ limits the overall output to a safe level, then returns to normal amplification once the loud input has stopped. Never miss a sound you want to hear, and protect your hearing for life.

TETRA products instantly shut down and instantly recover for sudden loud noises, like gunshots, providing the wearer full protection at the very moment it’s needed. For more sustained loud inputs, like loud calling, AlphaShield Compression™ limits the overall output to a safe level, then returns to normal amplification once the loud input has stopped. Never miss a sound you want to hear, and protect your hearing for life.

“ClearComm™ is our proprietary algorithm that accentuates human speech while minimizing noises and distractions that occur outside of the frequency range of human voices. ClearComm is useful for better understanding speech and talking with shooting partners, hearing speech on the range, as well as in other daily activities that require better hearing.

Waterfowl devices

Waterfowl devices make voices in the blind and calling clear and natural, wings-whistling, wood duck squeals and mallard drakes easily audible, and loud-calling and shotguns safe.

Deer devices

Deer devices accentuate the sounds of deer movement and vocalizations.

Turkey devices

Turkey devices make gobbles and yelps louder and clearer for better detection, distance judgement, and direction.

Elk devices

Elk devices make bugles, grunts, and barks louder and clearer for better detection, distance judgment and direction.

Range devices

Range devices are optimized for the most critical sounds for the shooter, while providing hearing protection from gunshots.

Upland devices

Upland devices enhance bird flushes, dog ecollars, and cow bells.

Multi-Pursuit devices

You can even get Multi-Pursuit devices that have programs for each pursuit.

RESEARCH

How We Localize Sound
Hunters, and the animals we hunt, are designed with two ears, so brains gather different information in each ear with slightly different clues. Because ears are on opposite sides of the head, the sounds heard by either ear will vary in timing, volume, and frequency. These differences are the clues your brain uses to decode a sound’s location.
Let’s say sound is coming from the left:
Variations in Timing: That sound hits the left ear milliseconds before hitting the right ear.
Variations in Loudness: That sound will be slightly louder in the left ear than the right ear.
Variations in Frequency: Because the head blocks some frequencies, the left ear will get all the frequencies, while the right ear gets less frequency information.
At TETRA, our hearing scientists have designed AmpPod technology to maximize your hearing clues in both ears.

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