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Authoritative PPT Summary
"Protect Our Hearing" Sound PPT Courseware
What is noise?
Describe the characteristics of noise and how we experience it.
Noise is noise. It is a type of sound that causes people to be irritated or whose volume is too strong and endangers human health. Usually refers to those unpleasant, annoying sounds. Noise pollution mainly comes from transportation, vehicle horns, industrial noise, construction, social noise such as concert halls, loudspeakers, morning markets and people talking loudly.
Hearing protection common sense
When washing your hair and swimming, avoid sewage entering the ears, which may cause ear inflammation.
When a foreign object enters the ear canal, do not dig it out yourself to avoid damaging the eardrum. Seek medical attention as soon as possible.
Avoid listening to earphone radios or tape recorders for long periods of time, and the volume should be adjusted to moderate or below.
In noisy environments, cover your ears with your hands or wear ear protection.
Only take medications under the guidance of a doctor, as overdose of some medications may cause tinnitus or hearing loss.
When you notice ear discomfort, such as pain or pus discharge, you should seek medical advice as soon as possible.
Think about it: how to control the sound of objects
Put a few beans inside a plastic bottle to make a sound-making device. Think about how to make the sound of the generating device softer?
Cover it with your hands or wrap it in paper
Place some wooden boards or books between the bottle and your ears
Put cotton in your ears or wear earplugs
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