Exploring Sound Waves and Vibration

What characteristic of sound is described as loud or weak?

What is necessary for sound to propagate?

What happens to the sound when it reaches the eardrum?

What is the term for the speed of sound?

What is the function of the auditory nerve?

What happens when we place our hands on the throat and chest when we speak?

What do we observe when we place salt and pepper on a membrane?

What happens to the candle's flame when a speaker is nearby?

How can we hear our interlocutor speaking from a distance?

What happens to the sound when it reaches a solid object?

What is true about low sounds?

How can we make a sound louder or weaker?

What is true about sound propagation in water?

Sound and Vibration

A sound is a vibration that can be felt in our body, as demonstrated by placing hands on the throat and chest when speaking.
Sound can be observed through the movement of objects, such as salt and pepper grains on a membrane, a candle flame, and a telephone wire.

Propagation of Sound

Sound vibrations propagate through the air and make other objects vibrate.
Sound can propagate through water, but not in the same way as in the air.
The vibration of sound can be blocked or hindered by certain materials, such as plastic.

Characteristics of Sound

Sound can be low-pitched (grave) or high-pitched (aigu).
Low sounds have longer and more spread-out waves, while high sounds have shorter and more repeated waves.
Sound can be loud (fort) or weak (faible), and its intensity can be amplified or attenuated.
Sound can also be modified in terms of frequency, duration, and timbre (speed).

Sound Production and Perception

Sound is produced by a source, such as a speaker, and makes the eardrum (tympan) vibrate.
The vibration is transformed into electrical impulses and sent through the auditory nerve (nerf auditif).
The sound is then decoded and understood in the brain.

A series of experiments to demonstrate the concept of sound waves and vibrations through hands-on activities. Observe vibrations in the body, salt and pepper movement, candle flame motion, and telephone cup resonance.