Troubleshooting & Setup Support

1. Connect the mic cable to your device’s audio input (2-way radio, mobile phone, Xbox, computer).
2. Insert the contour-molded earpiece so it sits comfortably and securely in your ear.
3. Use the PTT (push-to-talk) button to speak, clipping it wherever is most convenient.
4. Adjust the throat strap and transponder to find your personal “sweet spot.” This varies depending on anatomy, voice quality, and facial hair.
   – Moving the transponder closer to the center of your throat increases volume but may cause distortion.
   – Moving it slightly away can reduce muffling and improve clarity.
5. Secure the strap once you find the optimal balance of volume and clarity.

Proper adjustment ensures clear, reliable communication under all conditions.

IASUS Noise Terminator (NT) throat microphones work differently from conventional headsets. Traditional boom mics rely on acoustic induction from sound waves in the air, which often captures background noise.

By contrast, NT3-R, GP3-R, and NT5 mics pick up voice vibrations directly from the larynx via a single aluminum transponder positioned just off the center of the throat. This design naturally eliminates background noise, making the system ideal for noisy environments and covert communication.

Many throat mics use a double-transponder setup, placing one on each side of the throat. This can cause distortion because most people’s necks are not perfectly symmetrical. IASUS solves this with a single-transponder design, positioned 1–2 inches from the throat’s center to hit the optimal “sweet spot” for clarity and volume.

In noisy environments such as clubs, concerts, or on motorcycles, always use the NT5 system’s acoustic coil earpiece with an earplug. This allows your brain to register the audio clearly without raising the volume to unsafe levels.

Without proper protection, the NT5 requires the audio source to be louder than surrounding noise, which can increase the risk of temporary or permanent hearing damage.

If you prefer not to use the acoustic coil earpiece, the NT5 system is also compatible with optional earbuds or helmet speakers, providing flexible listening options while maintaining clarity and safety.

The NT5 system is compatible with most popular mobile phones and two-way radio models. For detailed information on required adapters and specific compatible devices, please refer to our full compatibility table.

For optimal performance, pair your NT5 throat mic with higher-end or higher-powered UHF radios. Lower-end radios may not meet the performance specifications of the NT5, which could affect clarity and transmission quality.

Unlike traditional mics, throat mic transponders have a tendency to sound “muffled” (sounds like you have a cold) because nasal sounds do not get transferred through vibrations in the neck. The IASUS throat mics through three generations of development are the most refined on the market today. When used properly they deliver the clearest communication under extreme environmental conditions such as wind and noise.

When using the throat mic, it is important to speak clearly and to maintain a normal audible tone (speak as if you are talking in an ambient room). This is not inherently natural, as we tend to speak louder when the environment is noisy or windy but this technique will optimize the sound quality of our transponder communication.

Usually this is simply a matter of finding the ideal location for the transponder on your throat. Everybody has a “sweet spot” that balances volume and clarity, and it is generally found about 1 to 2 inches from the center of your throat. However, its location is different for everyone and depends on factors such as your individual anatomy, voice quality, and amount of facial hair. Moving the transponder closer to your voice box (at the center of your throat) will boost the volume, but may cause distortion. If the sound quality is muffled, move the transponder further away from the center of your throat. You should keep readjusting the throat strap and testing the unit until you find the sweet spot.

Another potential cause of poor sound quality is the device you are using to transmit the signal. Better audio sources—such as higher-end radios—result in better communication. We recommend pairing our headsets with higher-powered UHF radios. Certain low-end recreational radios are not up to the performance specifications of our throat mics and can interfere with their performance.

In particularly noisy environments such as inside clubs, at concerts, or while under heavy fire, pairing the NT 3 system’s earpiece with an earplug is a MUST. This is because in order to register sound, the brain processes the dominant sound level from either the left or right ear. That means that when using the NT3-R in a loud environment, the volume of the audio source needs to be louder than the external noise in order for your brain to “hear,” resulting in potential loss of hearing in high volume situations. Plugging the open ear prevents this sensory imbalance.

IASUS Noise Terminator Throat Mic systems work quite well with the voice activation (VOX) functions of many cellular phones. However, users must first re-record the voice tag using their throat mic. The phone’s software will not match the user’s voice when using the Noise Terminator with a tag recorded under normal conditions. Also, remember to wait for the signal from the phone first before speaking to activate the voice tag.

Pressing the CE+ button when you turn on your FRS will remove this loud sound.

You need to make sure the radio is powered-off when you plug in the headset. The headset should function normally after the radio is powered on again.

Please make sure that the radio is positioned correctly on the charger so that all four contacts are lined up with the charging rails.