6th GradeObjective 1.6

Objective 1.6

Summarize protective measures for ears and hearing.

The Ear

How Old Are You Ears?

https://www.youtube.com/watch?v=VxcbppCX6Rk

Noise Levels by Daily ActivitySource of Noise Sound level (dB)

Firearms 140 to 170

Jet engines 140

Rock concerts 90 to 130

Amplified car sound systems 140 (at full volume)

Portable stereos (e.g., MP3 players)

115 (at full volume)

Power mowers 105

Subway trains 100

Video arcades 100

Electric razors 85

Crowded school buses 85

School recesses or assemblies 85

Noise Pollution

What Is Noise Pollution? sounds that cause harm/loss to one’s hearing

How Can You Reduce Noise Pollution?

Hearing Loss

Hearing loss can result from damage to structures or nerve in the inner ear that respond to sound.

This type of hearing loss, termed “noise-induced hearing loss,” is usually caused by exposure to very loud sounds and cannot be medically or surgically corrected.

http://kidshealth.org/kid/htbw/ears.html#

When Finished take quiz on edmodo.

Hearing Loss

Sound intensity is measured in decibels with a sound level meter.

Noise-induced hearing loss can result from a one-time exposure to a very loud sound, blast, impulse, or by listening to loud sounds over an extended period.

The louder the sound, the shorter the time period before hearing damage occurs.

Hearing Loss

Because the damage from noise exposure is usually slow, a person might not notice or might ignore signs of hearing loss until more symptoms of permanent hearing loss become evident.

Signs of Hearing Loss

Noticeable signs of hearing loss can include the following: Muffled or distorted hearing Difficulty hearing sounds such alarm clocks, watch

alarms, telephones, or doorbells Difficulty understanding speech during telephone

conversations or while participating in group conversations

Pain or ringing in the ears after exposure to very loud sounds