1.2 Representing sound

What is sound, in terms of its physical nature?

• A vibration that propagates as an audible wave of pressure through the air.

• The reception of waves and their perception by the brain.

• A continuous electrical signal.

• A series of discrete binary values.

What process is used to convert an analog sound signal into a digital, binary one for storage?

• Digital to Analog Conversion (DAC)

• Analog to Digital Conversion (ADC)

• Sound Wave Modulation (SWM)

• Binary Encoding (BE)

What two main factors affect the quality of a digitally converted sound wave?

• Volume and Pitch

• Frequency and Amplitude

• Sample rate and Sample resolution

• Bit depth and Bit rate

Which formula correctly calculates the total number of bits in a sound file?

• (Number of samples per second) + (Number of bits per sample) + (Length of sample in seconds)

• (Number of samples per second) x (Number of bits per sample) x (Length of sample in seconds)

• (Number of samples per second) / (Number of bits per sample) x (Length of sample in seconds)

• (Number of samples per second) x (Number of bits per sample) / (Length of sample in seconds)