Ever wondered whether your hearing falls within a ‘normal’ range? Try the audio checks below and find out.
Our ears are critical to our awareness of what’s going on around us. But even when working perfectly, they have limits. So, what are the upper and lower reaches of our aural sense? What is a ‘normal’ human hearing range? And what kind of variations can we expect from person to person?
First, let’s start with some hearing basics.
Humans and animals hear by picking up on vibrations caused by sound waves in the air (or in some cases, the ground and water). In the simplest terms, we ‘catch’ these vibrations in our middle-ear, where they’re transferred into pressure waves. These waves are then passed through fluid into our inner-ear, or cochlea, where they’re translated into signals our brains can interpret. The number of sound vibrations emitted per second is known as the frequency, which is measured in hertz (Hz). The lower (or higher) the frequency, the lower (or higher) the pitch of the sound. The other consideration is loudness, which is measured in decibels (dB).
Now, let’s look at some numbers.
Due to the impacts of continued exposure to loud noise over time, usually the younger we are the better we hear. The ‘normal’ hearing frequency range of a healthy young person is about 20 to 20,000Hz. And though a ‘normal’ audible range for loudness is from 0 to 180dB, anything over 85dB is considered damaging, so we should try not to go there. As we age, it’s the upper frequencies we lose first. So, by the time we hit middle-age we can expect to hear up to around 14,000Hz.
Sounds with frequencies above the realms of human ears are called ultrasound, and those below are called infrasound. Though we’re capable of distinguishing between 1400-odd pitches, most of the important speech-related sounds fall within a narrow, relatively low spectrum. The highest note of human speech is a soprano singer’s C7 (around 2048Hz) and the lowest the C2 of a bass singer (around 64Hz). And though we can’t scream much above 3000Hz, US singer Tim Storms has sung a note at 0.189Hz. Ironically, no human will ever hear it, although it is possible to feel it.
So, where do you sit on the human hearing spectrum?
Ever heard the hum of an alternating electrical current at night? That’s in the realm of 50 to 60Hz – not too far from the bottom of the human hearing range. And at the upper end, think dog whistles. To us they sound like a quiet hissing sound but to our canine friends it’s an air-raid siren. Try these lower and upper sound frequency checkers to find out your audible range.
To find out more about your hearing health, book a free hearing test.
NHC blog is our place to explore ideas and themes of interest. For professional audiology advice, please contact your local clinic for a consultation.