"How We Hear Sound" Sound PPT Courseware

Description

"How We Hear Sound" Sound PPT Courseware

Review questions

1. How is sound produced?

Sound is produced by the vibration of objects.

2. How does sound spread to distant places?

Sound travels through media.

3. What are the three types of media that transmit sound?

4. In what form does sound propagate in the medium?

Sound travels in the form of sound waves in all media.

The basic process of how people perceive sound

Sound from the outside causes the eardrum to vibrate

This vibration is transmitted to the auditory nerve through the ossicles and other tissues

The auditory nerve transmits signals to the brain, so that people hear sounds

3. What is deafness?

1) During the entire process of sound transmission to the brain, if any part is blocked (such as damage to the eardrum, auditory ossicles, or auditory nerve), the person will lose hearing, leading to deafness.

2) Nervous deafness and non-nervous deafness

(1) Deafness caused by damage to the auditory nerve is neurological deafness, which cannot be cured.

(2) Deafness caused by obstacles in the conduction of sound (such as damage to the tympanic membrane and auditory ossicles) is non-nervous deafness, which can be cured.

Think about it, do it

1. Put the vibrating tuning fork to your ear and listen to the sound of the tuning fork.

2. Block your ears with your fingers and listen to the sound of the tuning fork.

3. Block your ears with your fingers, and place the tail of the vibrating tuning fork against your forehead, the bones behind your ears, and your teeth. See if you can hear the sound of the tuning fork?

What does this experiment tell us?

In our lives, many audio equipment are two-channel stereo or multi-channel stereo. What is going on?

The sound that people usually hear is three-dimensional. To reproduce the stereo sound on the stage and make us feel immersed in the scene, we can place two microphones in different positions on the left and right (equivalent to two human ears). Use two lines to amplify two sound signals respectively, and then play them through the left and right speakers. In this way, you will feel that different sounds are coming from different locations. This is often called two-channel stereo.

If you want to get a better stereo sound effect, you can place more microphones around the sound source and put more speakers around the listener. This way the listener will feel that the sound comes from all directions and the stereo effect will be better.

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

"How We Hear Sound" Sound PPT Download:

"How We Hear Sounds" Sound PPT Download Part 1: Introduction to the new lesson How do ears hear sounds? The vibration of the object produces sound, which is transmitted through the air to our ears in the form of waves. So how do the ears hear the sound?

"How We Hear Sounds" Sound PPT:

"How We Hear Sound" Sound PPT Part 1 Content: The Structure and Function of the Ear Observe the structural diagram of the ear. Think about what are the main functions of the outer ear, middle ear, and inner ear? Share your ideas within the group. Sound ear canal tympanic membrane auditory ossicles cochlea auditory nerve large...

"How We Hear Sound" Sound PPT Courseware 3:

"How We Hear Sounds" Sound PPT Courseware 3 (1) Structure of the ear External ear: auricle External auditory canal Middle ear: Tympanic membrane Auditory ossicles Inner ear: Semicircular canal Eustachian tube Auditory nerve Cochlea (2) The functions of each part of the auricle are ( ) function. The external auditory canal has ( )..

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Update Time: 2024-07-01

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

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