TAKING CARE OF YOUR HEARING. Statement of Objective Students will learn how to protect ears from damage due to noise pollution. Students will continue.

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Presentation transcript:

TAKING CARE OF YOUR HEARING

Statement of Objective Students will learn how to protect ears from damage due to noise pollution. Students will continue to work in groups on Restaurant project

Outer Ear - part of the ear that collects sound waves Sound waves - vibrations or movements of air

Middle ear - part of ear in which sound waves push against eardrum causing it to vibrate. Inner ear - part of the ear that sends messages to the brain & helps a person keep his or her balance.

DECIBELS (dB) A unit used to measure the loudness of sounds. 40 to 60 decibels are comfortable. Above 70 decibels are annoying and can cause hearing loss.

Serious hearing loss can occur from sounds of 120 decibels. 140 decibels might cause pain as well as hearing loss.

Decibel levels of Common sounds Rocket launch 180 dB Jet engine at close range 150 dB Live Rock Concert 118 dB Power Lawn mower 86 dB City traffic 81 dB Normal conversation 58 dB Whisper 32 dB

Noise Levels by Daily Activity Source of Noise Sound level (dB) Firearms 140 to 170dB Amplified car sound systems 140dB Portable stereos (Ipod) 115dB Weed Eater 105dB

Noise Levels by Daily Activity Subway trains (Lynx Blue line) 100dB Video arcades 100dB Crowded school buses 85dB School recesses or assemblies85dB

Questions to Answer from Video What is Frequency? What is Resonance? What is an Echo? What is Ultra sound?

Noise Pollution - loud or constant noise that causes hearing loss, stress, fatigue, irritability & tension. Audiometer - A machine used to access the range of sounds that a person can hear.

WAYS TO CARE FOR YOUR EARS Do not insert any objects into the ear canal. Wear earplugs when swimming to prevent ear infections. Wear a hat, scarf, or earmuffs to prevent cold from irritating the middle ear. Keep volume of CD players, TV’s IPODS at a safe level

WAYS TO CARE FOR YOUR EARS Avoid listening to music at unsafe levels through headphones. Clean the outer ear with a soft, clean washcloth to avoid wax buildup in the ear canal. Wear protective earplugs when operating loud machinery, or using power tools.