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Human facts

Hearing Range

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[/ toggle] [toggle title = "Hearing Range"]
The extent of hearing is the range of frequencies that a person or animal can hear.

  • Humans: 20 Hz - 20 000 Hz (significant variation occurs between people). People can also feel inaudible sound waves by physical vibrations (4 to 16 Hz)(depending on age and race)
  • Dogs: 40 Hz - 60 000 Hz 
  • Cat: 45 Hz - 64 000 Hz
  • Bats: 20 Hz - 120 000 Hz
  • Mouse: 1000 Hz - 91 000 Hz
  • Dolphins: 0.25 Hz - 150 000 Hz
  • Sonic - 20 Hz - 20 000 Hz - the extent that people can hear
  • Ultrasonic - up to 90 000 Hz - dogs, bats and mice
  • Infrasonic - from 0.25 Hz - snakes, whales and dolphins

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  • The WHO estimates that there are 360 ​​million people worldwide hearing loss. Of these, 328 million adults and 32 million children. It involves more than 5% of the population
  • In 1998 it was found that 4 million South Africans suffered from hearing loss
  • About 10 million people in the UK are deaf or have severe hearing loss. It is one in seven people of the population (Source: Deafness Research UK). It is predicted that by 2015 there will be 14.5 million people with hearing loss
  • Hearing loss affects one out of every six Australians. This means a total of approximately 3.55 million people. Three out of four Australians over the age of 70 suffered an hearing loss
  • One in ten Americans has hearing loss. It is more than 28 million people. A study has shown that 65% of people with hearing loss are retarded
  • In the EU about 55 million people between the ages of 18 and 80 suffer from hearing loss
  • In North America, the number is estimated at 35 million

[/ toggle] [toggle title = "Hearing & Hearing Loss Quotes"]

  • The sense of audience is connected to the heart. Therefore, audio (speech and music) affects us directly (Katherine Le Mee)
  • Forgive me when you see that I withdraw while I would like to chat with you. My disability is double sad for me. I have to be alone, like someone who has been expelled. When I get close to people, I get anxious. I feel that someone may notice my condition. How humiliating when someone can hear me a whistle or a sheepdog who sings and I hear nothing! Such things make me desperate and could drive me easily to end my life. It was just my art that turned me away (Ludwig von Beethoven)
  • We spend one third of our lives with closed eyes because we sleep. This is about twenty years. In any second of those twenty years, your ears can command your eyes to open and search for the origin of a sound. When our eyes are open, our ears can still hear through walls and wherever the eyes can not see, and still ask the eyes to seek the sound (Jim S Davis II)
  • If I could only have one of my senses, I would choose to listen. Then I would not feel so alone (Helen Keller)
  • The easiest way to break your loved one's resistance to hearing aids is to stop his ears (Dr Richard Carmen)
  • You must hear what you do not want to hear in order to know what you do not want to hear (Dr Gustav Mueller)
  • When someone in the family has a hearing loss, the whole family has hearing loss (Mark Ross PHD)
  • My wife says I have hearing loss. That's what I think she said (Anonymous)
  • Blindness separates us from things but deafness separates us from people (Helen Keller)
  • Hearing loss is a bit terrible because it can not be restored (Pete Townshend of The Who)
  • Additional listening device is like eye sighters (Dr Cynthia Compton Connelly)
  • All the sounds of the earth are like music (Oscar Hammerstein II)
  • We should hear at least one song every day, read a good poem, see a beautiful picture and speak some meaningful words (Johann Wolfgang von Goethe)
  • An unhandled hearing loss is much more visible than hearing aids (Dr Sergei Kochkin)[/ toggle] [/ accordion]


Hearing & Hearing Loss

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Hearing loss
  • Hearing loss is the third most common health issue in older adults (after hypertension and arthritis)
  • 90% of hearing losses can be treated by using hearing aids
  • 16% of doctors routinely screen for hearing loss
  • On average it takes people 10 years to address their hearing loss

Hearing Facts

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  • Hearing threshold and the ability to localise sound sources are reduced under water
  • Your ears don’t switch off during sleep, they continue to hear sounds
  • We hear with the brain. The ear is simply the brain’s “microphone”
  • Your ear drum is less than 17.5 mm in diameter. It moves less than a billionth of an inch when hearing.
  • Nobody knows how the brain tells the difference between high pitched and low pitched sounds, or between loud and soft sounds.•
  • Your ear does more than just let you hear—it also gives you a sense of balance. Maybe you’ve noticed feeling dizzy if you’ve had an ear infection.
  • You get a new ear canal every year! The ear canal skin is constantly growing outward at a rate of 1.3 inches every year. If it didn’t fall off, you’d have a two foot string hanging out of your ear by the time you were 20!
  • When a person dies, hearing is generally the last sense to go. The first sense lost is usually sight, followed by taste, smell and touch

Mabaan Tribe Ghana

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Mabaan tribe

The Mabaans, an African tribe living in Ghana, live in such solitude and quiet that they have extremely good hearing. They can hear a whisper across a baseball field, even when they are old

Inner Ear

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The cochlea (inner ear) is about the size of a pencil eraser

Middle Ear

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  • The whole area of the middle ear is no bigger than an M&M
  • The smallest muscle in the body is the stapedius, located in the middle ear. It is only 1.4mm long and controls the smallest bone in the body, the stapes or stirrup bone.


Fun Ear Facts

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  • The smallest bones in the human body are the bones of the middle ear, the malleus, incus and stapes (the hammer, the anvil and stirrup)
  • The stapes is the smallest bone in the body and is only 2,8 mm long
  • The ear has over 25 000 tiny haircells to help you hear the nuances of sound