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FAQ

FAQ

What makes the DI-15 different from other earplugs?

DI-15 earplugs are "active"(electronic) earplugs, which means that they do more than JUST block sound like passive earplugs.  Passive earplugs affect sound quality and reduce the ability to hear very soft sounds, while traditional 'foam' plugs block sounds and complicate communication altogether.  Circuitry in DI-15 earplugs restores sound that is lost when the eartips seal off the ear canals and provide hearing protection when needed.  The intelligent technology of these noise reducing ear plugs for dentists allows for  100% natural hearing when sound levels are safe, then automatically protect from damaging sudden or sustained sounds, helping to prevent permanent hearing damage.

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What is the best eartip to use with the DI-15 earplugs?

Ears come in different shapes and sizes. To obtain optimal sound quality and noise isolation, eartips must be properly sealed in the ear canal. Di-15 earplugs are packaged with 7 pairs of eartips. We recommend experimenting to see which eartip provides the most effective seal for you.

I already have some hearing loss; is it too late?

No!  Though hearing loss is irreversible, what hearing you have left is still possible to preserve and protect!  Think of patients who ask us "Doc, I have lost some teeth, is there any point to saving the rest?"

Without protection, your remaining hearing could be lost forever...

Do I need custom molds for DI-15 earplugs?

Customization is an option, but in general it is not difficult to obtain a comfortable seal with the eartips provided. 

If customization is desired, visit your local audiologist.  Once an impression is made by the audiologist, those impressions need to be sent to a 3rd party earmold lab to create the actual custom sleeve.

There are several, but we often recommend Sensaphonics in Chicago because they’ve demonstrated the ability to make good earmolds for electronic hearing protection products.

What are filters and what are they used for?

DI-15 electronic earplugs are equipped with special filters that enhance sound quality and prevent ear wax and other agents from entering the receivers. If a filter becomes clogged, it should be replaced. The need to change filters varies widely among users.

Where can I order replacement eartips, filters, and other accessories?

All accessory purchases are available on our purchase page on the website, and will be shipped directly to you!

 

How long do batteries last?

Battery life: #10 hearing aid batteries tend to last about 10-14 Days after the tab is removed, based on amount of use.

Do not remove the battery tabs until ready to use DI-15 earplugs, because zinc air batteries may self-discharge in about 4 weeks whether they are used or not. Discharge rate varies with temperature and humidity.

After a tab is removed, it may take a few seconds for air to enter the vent holes and activate the battery.

Remember, you can keep your DI-15 in the OFF setting when not in use to help prolong battery life!

Recommendation: Always carry spare batteries.

Where can I find batteries?

Each device uses one #10 battery, a very commonly used hearing aid battery. #10 batteries are easy to find in pharmacies, super centers or RadioShack.

Does battery life depend on the mode used?

Yes.  The battery life will be maintained while in the "OFF" setting, and will deplete while in the "ON" 15dB-mode.

Make sure to allow 30 seconds of acclimation time when placing a fresh battery in your DI15 as this will also improve its life and performance!

Will I hear distortion in these earplugs?

Probably not. Peak sound pressure levels above 120 dB are reduced to safe levels by the output limitation of the circuit. Because these bursts are so short – on the order of a few milliseconds – the transients are safe. Since reduction is essentially instantaneous, hearing is protected from intense transients. The nearly instantaneous recovery time of the circuit means no loss of fidelity. Ongoing sounds are natural, so you are never "off the air" with these ear plugs for noise reducing.

What is "adaptive attenuation?"

DI-15 circuitry automatically changes output levels as sound input levels change. Hearing is natural, as if nothing is in the ears, until sound exceeds safe levels. As sound levels increase, earplugs gradually provide up to 15-dB sound reduction. Natural hearing is restored when sound returns to safe levels.

How can I test my plug to see it's working?

There are several options!

-Turn Off vs. On:  By turning your DI-15 in the "OFF" position, you should notice a significant muffling of sound.  Turn your unit back 'ON" and after several seconds you should notice sounds come to life and have clarity.  Your DI15 is working!

-Squeal Test:  Remove the eartip on your DI15, and then remove the tiny red filter with the filter removal tool.  Insert a fresh battery into your unit, allowing 30 seconds of acclimation for the battery before inserting.  Now, make a fist around the area where the filter goes; you should hear a "squeal/whistle" sound coming from your unit.  This means your DI15 is working!

What makes DI-15 earplugs high fidelity?

DI-15 earplugs contain high-definition transducers: balanced-armature drivers, high-sensitivity microphones, and wide-dynamic-range-compression K-AMP® signal processing that includes adaptive compression circuitry. The bandwidth (40 Hz - 16 kHz) is unprecedented, and the sound quality exceeds that of all known electronic earplugs and all modern digital hearing aid devices.

Why does my own voice sometimes sound boomy or hollow?

When eartips do not seal deeply in the ear canal, your voice may sound strange to you. This is known as the occlusion effect, which is caused by sound transmission into the ear from vibration of the ear canal wall when the ear is closed off (occluded) by an eartip. Vibration comes from sound pressure developed in the back of the mouth. The occlusion effect is most commonly caused by vibration from a person’s own voice, especially from speaking the sounds “ee” and “oo,” or from playing a brass or woodwind musical instrument. The occlusion effect is worst when there is a shallow insertion of the eartip. Deeply-sealed eartips reduce the occlusion effect. If this happens consistently, try using other eartips provided with your DI-15 earplugs to see if you can reduce vibration by achieving a better seal.

What is that funny ticking or motorboating sound I hear in my earplugs?

That sound is called LOBAT™ a special feature that warns you when a battery is at the end of life. The performance of the earplug does not change when that sound is present, and you usually have enough warning that you can change the battery at a convenient time. 

Does my DI15 have a warranty?

Yes!  Your DI15 comes with a 1-year warranty from time of purchase

Is there a return policy?

The DI15 comes with a 45-day return policy.  Follow the link labeled "Shipping and Returns" at the bottom of the page for more details!

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