WorksheetsSound Representation
Total questions: 10
Worksheet time: 6mins
What is sound?
A ball
A wave
A collection of particles moving in circles
A number of electrons moving in spirals
What is the amplitude of a sound wave?
How loud it is
How fast it travels
How much it changes
How easy it is to record
What is sampling?
The number of bits used to represent the sound
Turning a microphone on and off to only record sound at certain times
Taking measurements of a wave at regular intervals
Combining two sound waves into one
What is sample rate?
The number of bits used for a sample
How many times a sound wave goes up and down
How fast a sound wave moves
How many samples you take each second
What is sample rate measured in?
bits
Hertz
Kbps
Decibels
What is sample resolution?
Deciding on the amplitude of the wave
The number of bits per sample
The pitch of the sound
The number of samples you take every second
What does a microphone do?
Converts analogue sound waves into electrical signals
Converts electrical signals into sound
Makes a sound louder
Records a sound wave as a binary value
If the sample rate and sample resolution are increased, what happens to the sound file?
Quality goes up. Size of the file goes up.
Quality goes down. Size of the file goes down.
Quality goes down. Size of the file goes up.
Quality goes up. Size of the file goes down.
What things make a sound recording poor quality? (Tick all that apply)
Not enough bits to record the height of the wave accurately
Not enough samples taken each second
Not enough waves getting to the microphone
Not enough seconds in each sample
Which of these are steps in the recording of sound? (tick all that apply)
Microphone converts analogue sound into an electrical signal
Height of waves is measured intervals
Measurement is converted into binary number and stored
Speak converts analogue wave into an electrical signal
The height of the wave is drawn in binary as an image
