Sound and Light Waves Flashcards
How is sound produced?
Through the vibration of particles in a medium
The outer ear is for…
Collecting vibrations to transfer to the other parts of the ear
The middle ear is for…
Amplifying the vibrations
The inner ear is for…
Converting the vibrations into electrical signals to interpret as sound.
What happens as a speaker cone vibrates?
The vibrations cause compressions and rarefactions due to the back and forth motion of the speaker
What media does sound travel best through?
Any solid, the particles are close together making them easy to vibrate.
What happens to the pitch of a sound if the frequency is increased?
Will the loudness change?
Since frequency has a direct relationship with pitch, as the frequency increases the pitch will also.
Loudness cannot be affected by pitch OR frequency because frequency does not change the amplitude of a wave.
What is the Doppler Effect?
An observed change in pitch by the motion of either the listener or the source of sound.
If you were to stand in front of an ambulance, the pitch sounds ______ and why?
The pitch sounds higher because the motion of the vehicle causes compressions to occur in the wave that change its frequency and therefore also its pitch.
Why does striking a drum harder make it sound louder?
The back and forth motion of the drum caused by hitting it is more forceful, therefore generating waves that have a higher amplitude due to the force exerted on the object
What is an echo?
The reflection of a sound wave off a surface causing it to bounce back at an angle.
What is the use of echoes to locate objects
echolocation
What is the use of echoes used by HUMANS called
SONAR
Sound Navigation and Ranging
What is a sonic boom
When a shock wave reaches your ears due to an object breaking the sound barrier
What is constructive interference?
When compressions of one wave overlap the compressions of another wave
