Apple's AirPods Pro 2 will soon work as a hearing aid. Here's what it's like

• CNBC tested the new hearing health features coming to Apple's AirPods Pro 2, including the hearing test, hearing protection and hearing aid capabilities.
• The features are easy to use and set up from the comfort of your home, and they will be available through a software update next week.
• Apple initially unveiled its hearing health features at an event in September.

I tested the new hearing health features coming to Apple's AirPods Pro 2 headphones, and they saved me a long-overdue trip to the audiologist. 

Apple unveiled the features during an event in September, and they will be publicly available through a free software update next week. Users can take a clinically validated hearing test with the AirPods Pro 2, and the buds will serve as an over-the-counter hearing aid if applicable. The headphones will also be equipped with new hearing protection capabilities, such as loud sound reduction, that are switched on by default. 

More than 1.5 billion people are living with hearing loss, according to the World Health Organization. Tapping into this market could help Apple juice sales for the $249 AirPods Pro 2, which the company first launched two years ago. 

If you already own the headphones, the hearing health features are worth exploring. They take just a few minutes to set up, and they're easy to use from the comfort of your home. The AirPods Pro 2 are also a cost-effective option for those looking for assistive hearing technology. Other over-the-counter hearing aids can cost thousands of dollars without insurance, for instance. 

Taking the hearing test

I have a pair of third-generation AirPods that I use every day, but this was my first time trying the AirPods Pro 2. I took them straight out of the box, flipped open the lid to the charging case and paired them with an iPhone. After that, I popped them in my ears and prepared to take Apple's hearing test.

During its event in September, Apple said 80% of adults in the U.S. have not had their hearing checked in the past five years. That's certainly true in my case. The last time I remember getting my hearing tested was in elementary school. 

Admittedly, I haven't gone out of my way to protect my hearing, so I wasn't sure what my results would look like. I felt a little nervous beforehand. 

To access the test, you can go into the Health app or into the earbuds' settings menu. I pulled it up, and it prompted me with a few basic questions about my age, my health and whether I'd been exposed to a loud environment in the past 24 hours. 

You need to be in a very quiet space to take the test. Apple runs a background noise test to ensure your environment is suitable, and then it assesses the fit of your headphones within your ears. The AirPods Pro 2 come with medium-sized flexible ear tips attached, but there are extra small, small and large tip sizes included in the box. Apple sells a set of ear tips on its website for about $13 if you've misplaced yours.      

I took the test in my apartment, and I didn't need to adjust the fit of the headphones. I read the test's instructions and then it was time to get started. 

The hearing test plays a series of tones at different volumes and frequencies, and you tap the screen each time you hear a sound. It started with my left ear and moved to my right, and it took a little more than five minutes.

The hearing test was easy. There are some long pauses between tones, so I felt like I second-guessed myself occasionally. And Apple isn't kidding about finding a quiet space to take this test. Some of the tones were so soft that I practically had to hold my breath to hear them. My test also automatically paused a few times as traffic passed by outside, so I'd recommend finding a room that's as close to silent as possible.  

You can take the test as many times as you want, and you'll get your results as soon as you're done. A copy is stored in the Health app, and you can share it with your doctor. 

I learned that I have little to no hearing loss in both ears, though there are some frequencies that might be harder for me to pick up on. It's nice to have that peace of mind. 

Using your headphones as a hearing aid

Since I have minimal hearing loss, I was prompted to turn on a feature called "Media Assist," which uses my hearing test results to adjust the clarity of my calls, music and videos based on my specific profile. 

I had Media Assist enabled as I used the AirPods Pro 2 to FaceTime friends and family, watch CNBC and listen to different genres of music on Spotify. I didn't hear much of a difference with music or TV, but I did notice that voices seemed amplified on my FaceTime calls. It's a subtle change, but I found it helpful. 

If your test results show you have mild to moderate hearing loss, you'll be prompted to set up and use your headphones as a clinical-grade hearing aid. The U.S. Food and Drug Administration approved Apple's hearing aid software in September. 

"After you take a hearing test, your AirPods Pro are transformed into a personalized hearing aid, boosting the specific sounds you need in real time, like parts of speech, or elements within your environment," Dr. Sumbul Desai, Apple's vice president of health, said in a prerecorded video last month.

The hearing aid feature is intended for adults with mild to moderate hearing loss, but users can turn it on in their settings even if they don't fall under that category. Out of curiosity, I switched it on while walking around New York City, running errands, watching TV and chatting with my roommates. 

The feature instantly amplified the world around me, and I joked that it felt like a superpower. It was easier for me to hear quiet dialogue on TV, and my conversations were magnified. Interestingly, I didn't feel overwhelmed by the loud sounds of the city, which I suspect is due to the earbuds' new hearing protection features. 

Using a hearing aid can take some getting used to, so don't worry if it doesn't feel natural right away. You can also make specific adjustments to your liking in your settings and the iOS Control Center. 

The hearing aid feature was cool to try, even if I don't need to use it. It would be nice to switch it on in a crowded New York City restaurant, but otherwise, I got the support I needed from the Media Assist feature.        

If you have mild to moderate hearing loss and are prompted to turn on the hearing aid feature, Media Assist will also be activated. Your AirPods Pro 2 will automatically adjust as you make calls, watch videos and listen to music across all your Apple devices. 

Though I wasn't the ideal candidate for the hearing aid, I'm excited to tell my parents and grandparents about it. Since the AirPods Pro 2 look like any other pair of Apple headphones, they're less conspicuous than many existing hearing aids, which I expect will be an added perk for many users.