Transcript taking care of your hearing

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)
 Weed Eater

115dB
105dB
Noise Levels by Daily Activity
Subway trains (Lynx Blue line) 100dB
 Video arcades
100dB

Crowded school buses
85dB
 School recesses or assemblies 85dB

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.