13 Questions
What characteristic of sound is described as loud or weak?
Intensity
What is necessary for sound to propagate?
Vibrations of air, water, and materials
What happens to the sound when it reaches the eardrum?
It makes the eardrum vibrate
What is the term for the speed of sound?
Vitesse
What is the function of the auditory nerve?
To transmit sound to the brain
What happens when we place our hands on the throat and chest when we speak?
We feel the vibration in our body
What do we observe when we place salt and pepper on a membrane?
Grains of salt and pepper hopping
What happens to the candle's flame when a speaker is nearby?
It moves
How can we hear our interlocutor speaking from a distance?
As long as the wire is tight
What happens to the sound when it reaches a solid object?
It vibrates the object
What is true about low sounds?
They have a long and spread wave
How can we make a sound louder or weaker?
By turning up the volume or using objects to resonate
What is true about sound propagation in water?
It propagates but not in the same way as in the air
Study Notes
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.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
