Understanding sound

The world is full of beautiful sounds—waves rolling onto shore, a crackling summertime fire, the neighbor's lawnmower waking you up on Sunday morning. Alright, that last one is a bit of a stretch, but you get the point. Each sound can be measured in decibel units (dB) and is weighted to represent the sounds the human ear can physically hear (dBA).

If you spend a lot of time in noisy places, you may be wondering how loud is too loud. Can 100 decibels cause hearing loss? What about 70? Three factors come into play: intensity, duration, and distance.

Anything above 85 dBA can damage the small hair cells in your ears and affect your hearing health, either over time or—if it's loud enough—immediately. This is referred to as noise-induced hearing loss. Screen your hearing in less than 5 minutes.

While smartphones are often helpful, they aren't doing our ears any favors. If you're using headphones and your phone is at full volume, your inner ear is soaking up over 100 decibels of direct sound. Just a few songs in and you're already making those little hair cells work overtime.

When it comes to headphones and hearing health, prevention is key. Avoid turning up the volume too loud and always pay attention to those high volume warnings.

In a fast-paced, noisy world, it can be hard to judge when sounds are too much. But there are ways to better assess your surroundings. A sound level meter (SLM) can help you measure noise; you can even get SLM apps on your smartphone.

Keep in mind: Over 24 hours, you should try to keep noise below 70 dBA, and no higher than 75 dBA over an 8-hour period.

There are ways to protect your hearing health while still enjoying sound to the fullest. Whether listening to music or enjoying an audiobook, make sure to:

Noise-induced hearing loss can't be reversed and can cause major issues, from speech and learning difficulties to muffled sound and ringing in the ears. While we might not always be able to escape every noisy place all the time, the good news is: we can always protect our ears.

So what can you do?