Ear Notes/SoUND.

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Presentation transcript:

Ear Notes/SoUND

Eyes, ears, nose, tongue, and skin are examples Sense Organs The sense organs gather information (light, sound, heat, and pressure) from the environment. Eyes, ears, nose, tongue, and skin are examples

When a sound is made, the air around the sound vibrates. Hearing When a sound is made, the air around the sound vibrates. Hearing starts when some of the sound waves go into the ear.

Sound Waves Sound is a series of waves that move through matter. Sound does not travel through a vacuum.

Sound Sound moves at approximately 344 meters per second (770 miles per hour) at room temperature When a sound wave hits an object, it causes the object to vibrate. This leads to you to be able to detect sound.

Sound Waves Compression/Longitudinal waves: Sound travels in waves through the atmosphere. Sound can travel in transverse waves through solids.

3 Main Parts of the Ear Outer Ear Middle Ear Inner Ear

Sound waves traveling through the ear

The part that you can see. Directs sound into the ear Outer Ear The part that you can see. Directs sound into the ear

Middle Ear Ear canal: the tube between the outside of the ear and the ear drum. Ear drum: Vibrates when sound waves hit it.

The three smallest bones in the body are in the middle ear. Middle Ear Bones The three smallest bones in the body are in the middle ear. Hammer Anvil Stirrup Vibrations travel from ear drum -> Hammer -> Anvil -> Stirrup -> Inner ear

Middle Ear Hammer Anvil Stirrup Ear Drum

Inner Ear Cochlea: fluid-filled organ in inner ear Vibrations makes waves, which send message to nerve Auditory nerve: carries the hearing information to the brain and the brain tells us what we heard. Cochlea

The Ear & Balance Semi-circular Canals Semicircular Canals: fluid-filled canals in your ear that contain hair cells As you move, the hair moves from the liquid and sends messages to your brain about how you are moving.

Hearing Loss Presbycusis: lose hearing as you age; runs in families; also caused due to extended exposure to loud noises Sudden Sensorineural Hearing Loss (SSHL): rapid loss of hearing; usually only one ear; more than 100 possible causes (disease, trauma, abnormal tissue growth, etc.) Noise-Induced Hearing Loss: caused by loud sounds, can be sudden (ex: explosion) or over time (ex: wood- shop)

Hearing Loss Pendred syndrome: genetic disorder where early hearing loss occurs in children (by age 3) Meniere’s disease: a disorder of the inner ear that causes severe dizziness, ringing in the ears, hearing loss, and a feeling of fullness or congestion in the ear; usually affects only one ear; caused by build-up of fluid in the inner ear