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Hearing, Hearing Loss, and Prevention
Transcript of Hearing, Hearing Loss, and Prevention
and Prevention How Do We Hear? Three parts of ear:
Inner ear Outer Ear -Ear canal and eardrum
-Sound wave travels down ear canal and hits eardrum
-Eardrum moves back and forth Middle Ear Three bones
After eardrum vibrates, three bones move Cochlea
Filled with fluid
When middle ear bones move, fluid inside cochlea moves Inner Ear Inner Ear Moving fluid bends hair cells
Hair cells send signal to brain
Brain figures out what you heard Our ears help us keep our balance! Fun Fact! That's interesting! Fun Fact!
Humans hear the best when they are about 11 years old.
So right now, your hearing is the best it will ever be! All sounds have frequencies and decibels
Frequency measures how high pitched a sound is
Decibels (dB) measure how loud a sound is Sound High and Low Frequency Sounds High frequency sounds
a bird chirping
sounds like /f/ and /th/ as in 'fort' and 'three'
Low frequency sounds
a bass drum
sounds like /u/ as in 'blue' High and Low Decibel Sounds High decibel sounds
a car horn
a rock concert Low decibel sounds
a bird chirping
leaves rustling A child with hearing loss may be able hear sounds like /m/ as in 'monkey' but not able to hear sounds like /s/ as in 'snake'
This is because sounds like /m/ have a low frequency, and sounds like /s/ have a high frequency What can YOU hear? The speech banana is a graph used to show which sounds people can hear well and which sounds are more difficult if they have hearing loss. The Speech Banana Use this website to check out a cool interactive sound ruler
http://www.noisyplanet.nidcd.nih.gov/tweens/Pages/coolstuff.aspx Conductive Hearing Loss
Sensorineural Hearing Loss
Mixed Hearing Loss Types of Hearing Loss Conductive Hearing Loss Occurs when sounds are not transmitted through the outer ear or inner ear correctly
This means things will sound softer than they should Conductive Hearing Loss Some Causes
a hole in the ear drum
allergies or a cold
an object blocking the ear canal
Normally, medicine or surgery can correct this hearing loss Occurs when there is damage to the inner ear or the nerves that go to your inner ear
Sounds will be softer or unclear when you hear them Sensorineural Hearing Loss Sensorineural Hearing Loss Some Causes
drugs that harm the ear (ototoxic)
Normally, medicine or surgery cannot correct this hearing loss A combination of conductive and sensorineural hearing loss Mixed Hearing Loss Fun Facts! Sensorineural hearing loss is the most common type of hearing loss
36 million Americans have a hearing loss of some kind Caused by:
-Sounds that are too loud
-Loud sounds heard for too long
Structures in the inner ear become damaged. Noise Induced Hearing Loss -Length is measured in feet, as sound is measured in decibels.
-When we speak, our conversation with someone is at 60 dB.
-The sound of a motorcycle is between 120 to 150 dB! If we were around this without protection of our ears for a long period of time, it can cause Noise Induced Hearing Loss. What sounds cause Noise Induced Hearing Loss? - May cause ringing or buzzing in the ears (Tinnitus)
-Depending on the loudness and noise exposure time, hearing may be regained within a few hours or two days. What are the effects of Noise Induced Hearing Loss? -Sounds become muffled
-Difficult to understand speech Symptoms of Noise Induced Hearing Loss Harmful noises to use protection when around:
-music of a band / attending a concert
-loud music in headphones
-some school cafeterias Be Careful! Fun Facts! -100% preventable
-Conversation does not become softer with this hearing loss, it becomes more difficult to hear. SUPER EARS? Be Careful... More than 85 dB consistently is dangerous
The longer that you are exposed to a loud noise, the more damaging it could be
Loud noises can affect more than just your ears:
Rise in blood pressure & heart rate
There's no way to
TOUGHEN UP your ears! Earplugs:
Completely block the ear canal
Different shapes and sizes
Can be fitted into a headband
Best for low-pitched, loud noises Protect Your Hearing! Earmuffs:
Fit over entire ear
Will not seal around hair or glasses
Best for high-pitched, loud noises
You can wear both earplugs
and earphones for maximum
protection! Protect Your Hearing! -Wear earplugs
-Be aware of dangerous sounds
-If you think you have a hearing loss, tell a parent and see a doctor!
-Protect against damage now, before it begins! Preventing Noise Induced Hearing Loss PREVENTION http://www.asha.org/public/hearing/How-We-Hear/
•ASHA: http://www.asha.org/public/hearing/disorders/types.htm References Earplugs: http://www.northernsafety.com/photos/product/180189/400.jpg
Super Ears Meme: http://i.chzbgr.com/completestore/2010/7/13/81ddaabd-8d9d-4bbb-b2e5-ceaeb8922b42.jpg
SUPER EAR: http://images.clipartof.com/thumbnails/9091-Clipart-Picture-Of-An-Ear-Mascot-Cartoon-Character-Dressed-As-A-Super-Hero.jpg
NIHL: http://3.bp.blogspot.com/_d2Tku88FSjQ/TN19b-jrKVI/AAAAAAAAAGw/1IR4XZ-DIjY/s1600/17624-Middle-Aged-Caucasian-Man-Holding-An-Ear-Horn-Or-Ear-Trumpet-To-His-Ear-To-Amplify-His-Hearing-Clipart-Illustration.jpg References References
Just be careful, and always participate in hearing screenings! Who Can Have a Hearing Loss? You can lose your hearing when you grow up if you do not take care of your ears now.
Turn the volume down a little! Who Can Have A Hearing Loss? Anyone can! Who Can Have A Hearing Loss? Grandparents
Mom and Dad
Brother or Sister