Welcome to our Frequently Asked Questions page. You will find a list of questions with text responses and video response at the bottom of the page.

AudioCardio is a mobile app that is designed to protect and strengthen your hearing by listening to a personalized and “just inaudible” sound therapy. The AudioCardio™ app allows you to assess your hearing and generate a personalized sound therapy known as Threshold Sound Conditioning.

Threshold Sound Conditioning allows you to check your hearing and create a personalized sound therapy that stimulates the cells at the barely audible level.


Threshold Sound Conditioning stimulates the cells inside the ear in hopes of helping them connect to nearby cells to form pathways. These cells help send sound signals through the auditory pathway until they reach the part of the brain where this stimulation is interpreted as meaningful sound.


After doing this consistently, these pathways become easier to find and take so that these types of stimulation reach their destination to get processed as sound.

Hearing loss isn’t just an inconvenience. Untreated hearing loss has been closely associated with secondary physical and mental health issues ranging from an increased risk of falling to dementia. AudioCardio is an easily accessible and affordable sound therapy that aims to protect and strengthen your hearing anytime, anywhere.

The AudioCardio app records your scores on the sound therapy progress screen. Your first assessment is your baseline score. Compare your first score to subsequent scores to see your progress. You can also see the details of each assessment and compare them to previous assessment levels for each frequency range.

Use AudioCardio™ daily for one hour for best results. You can think of it like exercise. One hour per day is best, but some exercise is better than none.

We recommend using AudioCardio for just one hour a day as the was the amount of time that we tested it for during our clinical trials.

You may noticed at the beginning of every hearing assessment, we ask if you can hear the sound. Answering this question accurately, it helps the app determine which volume setting to set you at.

When you take the hearing assessment and you select “Yes” when it asks if you can hear the sound, it will move your hardware volume to 40%. If you select “No”, it will move your hardware volume to 60%.
Typically individuals who have strong hearing will select “Yes” and individuals with weaker hearing will usually select “No”. Whichever setting you select, we recommend sticking with it every time you take the hearing assessment. 

What does the assessment do? 

AudioCardio™ measures your threshold of sound based on the devices being used (earbuds / headphones) to deliver a custom sound therapy and sound experience. The assessment acts like a calibration for your personalized sound therapy.

How do I take the assessment? 

  1. Connect your headphones.
  2. Go to a very quiet room away from windows and electronics that give off ambient noise.
  3. Move the volume slider up to where you can noticeably hear the sound.
  4. Then bring the volume slider down to the point where you can barely hear it (barely audible level) and set it there.
  5. Set the slider at the barely audible level and press next. Do this five times for each ear.

Barely audible means that you are just at the point where the sound will completely disappear if you were to lower it by one more dBr. This is where you want to set each volume slider during the hearing assessment. If you start your sound therapy and can hear it while it is activated, retake your assessment and set the volume slider just below the barely audible level by one or two dBr levels.

This means your threshold of sound or lowest level that you are able to detect the sound is above 84 dBr. Set the sound therapy at the 84 dBr level for the frequencies that you cannot hear during the assessment. Although the sound therapy may still work for you, it may take more sound therapy sessions to notice any progress or you may have to use the frequency targeting feature to target other frequencies in hopes of making progress.

Retake your assessment whenever you change your earbuds, mobile device, anytime your AudioCardio sound therapy can easily be heard or at least once a week. Your sound therapy should always be barely audible (or inaudible) when activated. Remember to always do your assessments in a quiet room to ensure that the Threshold Sound Conditioning is calibrated correctly.

Each slider represents a range of frequencies. These ranges are key frequencies for speech, communication and music. Move them up and down to the barely audible level to personalize your sound therapy.

The hearing score is calculated after each assessment. Each dBr level has a value and the lower each dBr value is for each frequency range, the higher your hearing score.

This score represents great to below average hearing. The higher your score, the better (0-100 scale).

This is our internal hearing score for our app. The score is calculated by adding up the scores of each of the frequency levels (10 in total) that you test for. 

The higher the dBr value (e.g. 75 dBr), the lower your score would be for that particular frequency. The lower the dBr value (e.g. 26 dBr), the higher your score would be for that frequency. 

Ultimately, the goal is to bring down that dBr values for each of the frequencies within the app. By being able to listen to these sounds at lower dBr values, it means your hearing threshold is lower (this is a good thing) and it should make it easier for you to pick up on sounds with less effort. 

If your hearing score doesn’t change after using the AudioCardio app for three to four weeks, you should use the frequency targeting feature located in the top left corner of the start sound therapy screen to select a different frequency to target. You can see which frequencies you were previously targeting on the sound therapy progress screen by clicking the details of the last assessment. Select a different range from the one that you had been focusing on for the last three to four weeks.

Your sound therapy should not be audible while it is activated. The sound therapy plays right below the audible volume level. Your hearing assessment is what calibrates this sound therapy. If you can hear your sound therapy, retake your assessment and find the very lowest volume level that you can hear the tones being played in the assessment. Set the slider there or one to two dBr lower.

This means your hearing is changing. This is because the once inaudible sound therapy has become audible. Great job! Retake your assessment to adjust for your progress and get your next personalized sound therapy.

The AudioCardio app may still work for you if you have tinnitus. However, you must be able to distinguish the tones being played in the assessment from the sound of your tinnitus.

The AudioCardio sound therapy works by playing personalized sound therapies at the “just inaudible” level for the frequency range that is being targeted. This personalized sound therapy is calibrated by finding the barely audible volume for each tone being played in the assessment.

You may use AudioCardio if you have tinnitus. However, tinnitus affects everyone differently. Make sure the sound therapy is comfortable for your unique condition.


If you sense that you are feeling any discomfort, please discontinue use.

Yes, headphones or earbuds are required while doing the assessment and while you receive your sound therapy. Be sure to use the EXACT SAME headphones for both the assessment and sound therapy.

Any set is compatible as long as you use the same earbuds or headphones for your assessment and your sound therapy. Be sure to reassess your settings any time you change your hardware (earbuds, headphones, phone, tablet).

Yes, you can use Bluetooth headphones or earbuds with the AudioCardio app.

Yes, you may use AudioCardio with your hearing aids. However, always be sure that you use the EXACT SAME settings for your assessments and sound therapy. If you decide to switch to headphones or earbuds, you’ll need to retake the assessment again so that the app can calibrate to those earbuds or headphones.

You must also make sure that anytime your hearing aids are being used with AudioCardio, that “Mono Audio” is turned off in your phone’s settings. Please follow the steps below for most phone manufacturers. 

  1. Go to phone’s settings and find the “Accessibility” settings.
  2. Look for “Audio & Visual” settings and select it.
  3. Turn off “Mono Audio”.



Listening to music with your sound therapy is completely optional. You can find a list of supported services on the settings page within the AudioCardio app. Check back periodically for updated services.

You can still listen to media from other apps while the AudioCardio sound therapy is activated. Simply start the sound therapy in the AudioCardio app and then open your desired music streaming, podcast or audiobook app and play your favorite song, podcast or audiobook. The sound therapy will play in the background simultaneously.

Yes, you may use the AudioCardio app while using other apps. Go to the AudioCardio app and activate your sound therapy. Then go to the desired app and use it as you normally would. The AudioCardio sound therapy will still play in the background while you use another app. There are some instances where other apps may limit this ability, however, you will be alerted by a voice or push notification if you have them enabled within the AudioCardio app. The AudioCardio sound therapy does not work if you make or receive a voice or video call on the device running the AudioCardio app.

You can only change the volume of your music if you are playing music that is stored on your device. Unfortunately, music streaming apps like Spotify and Apple Music do not allow for us to simultaneously control the volume of the Sound Therapy and media volume at the same time.

Yes, many people activate the AudioCardio sound therapy as part of their nightly routine. The AudioCardio sound therapy automatically turns off after 60 minutes of use and is barely audible (if at all), so it will not disrupt your sleep.

The volume of the voice notification cannot be adjusted, however it can be turned off within the AudioCardio app. Follow the steps below to turn off voice notifications. 

  1. Open the AudioCardio app
  2. Select the settings icon in the bottom right hand corner of the app (it looks like a gear)
  3. Select notifications on the following screen (indicated by a bell icon)
  4. On the next screen, toggle the voice notification from on to off (it is the second option on the screen)
  5. The off state is in gray

Canceling your Subscription from our website: 

Note: This is for individuals who created an account through our website at https://app.audiocardio.com/signup.

1. Log into your web account with your credentials at this URL, https://app.audiocardio.com/login. 

2. Click on the Welcome tab on the top right corner.

3. Click on Subscriptions.

4. Find your plan and click Cancel.

Canceling your Subscription via Apple App Store:

1. Open the Settings app.

2. Tap on Your Apple ID.

3. Tap on “Subscriptions.”

4. Select the AudioCardio subscription.

5. Tap “Cancel Subscription” to disable it from auto-renewing at the end of the current billing cycle.

Canceling your Subscription via Google Play Store:

1. Open the Google Play Store app.

2. Tap Menu (3 small horizontal lines, upper left corner)

3. Tap Subscriptions.

4. Select the subscription you want to cancel.

5. Tap Cancel Subscription.

6. Follow the onscreen instructions.

You can email us at support@audiocardio.com


Video FAQs

How do I know this app is working for me?

What does barely audible mean? 

My hearing score isn’t changing. What should I do?

Should I hear anything while the sound therapy is activated?

When should I retake my assessment?

I have tinnitus. Will this still work for me?

What if I can’t hear the assessment frequencies at the highest dBr value?

Why should I use Frequency Targeting?

What happens if I start to hear a clicking sound while the sound therapy is active?

Designed to Strengthen Your Hearing and Relieve Tinnitus.

Designed to Strengthen Your Hearing and Relieve Tinnitus.

Download the AudioCardio App on the Apple App Store or Google Play store!