"How to Hear Sound" PPT courseware

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"How to Hear Sound" PPT courseware

Part One: Content Import

1. Structure of ears

2. How do ears hear sounds?

The sound waves collected by the auricle are transmitted to the tympanic membrane through the external auditory canal, causing the tympanic membrane to vibrate. The vibration of the tympanic membrane is transmitted to the cochlea through the auditory ossicles. The auditory nerve connected to the cochlea reports the sound signal to the brain, and we hear the sound.

3. Where is the most critical part of the ear?

The eardrum is a critical part of the ear.

Ears are human hearing organs. If they are damaged, hearing will decrease or even become deaf.

4. How to protect ears? (Ear health care)

1. Avoid noise;

2. Do not dig your ears with sharp objects to avoid damaging the eardrum;

3. Open your mouth when there is a loud noise to avoid bursting the eardrum;

4. Inflammation of the nose and pharynx must be treated promptly to avoid causing otitis media;

5. Prevent sewage from entering the ear canal to avoid external ear canal infection.

How to hear sounds PPT, Part 2: Consolidation exercises

1. Let me fill it out:

1. The ear is divided into three parts: _____, _____, and _____.

2. _____ and _____ are inside the head and cannot be seen by us.

3. The outer ear is made up of _____ and _____. The middle ear is composed of _____, _____, etc.

_____ is an oval, translucent film.

The inner ear is made up of _____. The cochlea is connected to _____.

4. The sound waves collected by _____ are transmitted to the tympanic membrane through _____, causing the tympanic membrane to vibrate. The vibration of the tympanic membrane is transmitted to the cochlea through _____. The _____ connected to the cochlea reports the sound signal to the brain, and we hear the sound.

5. Ears are the _____ organ of the human body. If they are damaged, people's hearing will _____, or even _____.

2. Be a good little judge:

1. After the eardrum is shattered, sound waves cannot travel to the middle ear and inner ear, and the person becomes deaf.

2. When encountering loud noises, shut your mouth tightly to protect your eardrum from damage.

3. When the sound you want to hear is far away and weak, put your hands behind your ears. Your hands can help the auricle collect sound waves, and the sound will be heard more clearly.

3. Let me choose one:

1. The function of the auricle is _____.

A． Collect sound waves B. transmit sound waves

2. The function of the external auditory canal is _____.

A． Collect sound waves B. transmit sound waves

3. The function of the eardrum is to _____.

A． Under the action of sound waves, vibrations are generated and transmitted to the cochlea through the ossicles.

B. Collect sound waves

Keywords: Qingdao version fifth grade science PPT courseware free download, how to hear the sound PPT download, .PPT format;

For more information about the "How to Hear Sound" PPT courseware, please click on the "How to Hear Sound" ppt tag.

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Update Time: 2024-11-22

This template belongs to science courseware Qingdao Edition Fifth Grade Science Volume 1 industry PPT template

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