Binary Sound 2023

State more than one effect of increasing the sample rate.

• More samples will be taken per second

• File size will be larger

• Less samples will be taken per second

• File size will be smaller

• Digital sound will be closer to the original analogue sound (more accurate)

State more than one effect of decreasing the sample rate.

• More samples will be taken per second

• File size will be larger

• Less samples will be taken per second

• File size will be smaller

• Digital sound will be less accurate to the original analogue sound.

State more than one effect of increasing the sampling interval.

• More samples will be taken per second

• File size will be larger

• Less samples will be taken per second

• File size will be smaller

• Digital sound will be less accurate to the original analogue sound.

State more than one effect of shortening/decreasing the sampling interval.

• More samples will be taken per second

• File size will be larger

• Less samples will be taken per second

• File size will be smaller

• Digital sound will be closer to the original analogue sound (more accurate)

State the measurement used for the sample rate of an audio file.

• Hertz (Hz)

• Seconds (s)

• Minutes (m)

• Bytes (b)

Label the y axis of this analogue sound wave.

• Amplitude

• Frequency

• Duration (Time)

• Volume

• Pitch

Label the x axis of this analogue sound wave.

• Amplitude

• Frequency

• Duration (Time)

• Volume

• Pitch

Calculate the number of bits needed for a 10 second audio file with sample rate of 5Khz. The bit depth is 8 bits.

(a)  

What is measured during the sampling of an analogue sound?

• Wavelength
• Amplitude
• Distance
• Length of the sound

Define what is meant by "sampling rate", when converting an analogue sound into digital.

• How many samples of the sound is taken per second.

• How many samples of the sound is taken per minute.

• It is the gap between each of the points where the analogue sound is sampled.

• It is the number of bits used for each sample.