"Protecting Our Hearing" Sound PPT Courseware 4

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"Protecting Our Hearing" Sound PPT Courseware 4

How did you feel after hearing the sound just now?

The first sound sounds pleasant and comfortable, and we call it musical sound.

The second type of sound is noisy, harsh, uncomfortable, and annoying. We call this type of sound noise.

The unit of sound is decibel. Generally speaking, 40-60 decibels belongs to our normal conversation sound, and above 60 decibels belongs to the noisy range. The higher the decibels, the louder the noise.

What harm does noise do to our ears?

Sounds that are too high or too strong can cause hearing loss or even deafness, affecting our normal learning and life.

Think about it: How do we protect our hearing when we encounter noise?

Cover your ears and open your mouth to reduce pressure on your eardrums;

You can stay away from the source of noise and study or live in a quiet place, or you can wear protective devices such as earplugs, earmuffs or helmets in noisy places.

There are other ways to protect your hearing!

1. Please do not pick your ears with sharp objects. This may cause damage to the ear canal and tympanic membrane, and sometimes infection, resulting in hearing loss. Therefore, we cannot pick our ears with hard objects, let alone put beans, pellets and other objects into our ears. If any debris enters, Ears should be treated in a regular hospital.

2. Please do not let water get into your ears. When bathing, washing hair or swimming, special attention should be paid to prevent water from entering the ears. Because the skin and eardrum are soaked in water, it is easy to cause otitis externa. If you feel that water has entered your ears, you should immediately tilt your ears and jump on one foot, pulling on the auricle to let the water flow out.

3. Please do not use portable video or audio players (Walkman, MP3, MP4, etc.) for a long time. The volume should not exceed 2/3 of its total designed volume;

4. Please do not use drugs that are harmful to the ears. Such as streptomycin, gentamicin, kanamycin, etc., because they have a toxic effect on the auditory nerve, so we should consult a doctor when we are sick and cannot use drugs indiscriminately.

5. Please avoid external impact. The ears and head should not be picked or hit to avoid concurrent hearing damage and tympanic membrane rupture.

6. Please do not wear earrings. The flesh of the ears is very tender, and if there is a metal object hanging on them, the ears can be easily torn and damaged when playing. At the same time, there are also regulations that do not allow primary school students to wear earrings.

Control the sound of an object

1. Make a sounding can so that it can make as loud a sound as possible.

2. Think about how you can make the sound of the sound can softer.

Extracurricular homework:

1. Investigate the hearing disability situation in the school and surrounding areas.

2. Collect more information on the dangers of deafness and promote it to friends around you through Alka.

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For more information about the "Sound protects our hearing" PPT courseware, please click the "Sound ppt protects our hearing" ppt tag.

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Update Time: 2024-11-22

This template belongs to science courseware Fourth Grade Science Volume 1, Textbook Edition industry PPT template

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