Self-Study 21 (J277) 1.2 Representing sound

What is sound described as in the video?

• A type of energy that travels through vacuum

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

• A form of light that we can hear

• A chemical reaction that produces noise

What is the process of converting an analogue signal into a digital binary one called?

• Binary Encoding

• Analogue-to-Digital Conversion

• Signal Processing

• Digital-to-Analogue Conversion

What are the primary factors that affect the overall quality of a digitally converted sound wave?

• Color depth and resolution

• Sample rate and bit depth

• Frequency and amplitude

• Compression rate and bandwidth

What is the sample rate measured in?

• Bits

• Hertz

• Bytes

• Pixels

What is the sample rate of a music CD?

• 48,000Hz

• 22,050Hz

• 96,000Hz

• 44,100Hz

What does a greater number of bits per sample indicate?

• Higher quality and larger file size

• Lower quality and smaller file size

• Higher quality and smaller file size

• Lower quality and larger file size

What is the bit depth of CD quality sound?

• 16 bits per sample

• 8 bits per sample

• 24 bits per sample

• 32 bits per sample

How is the total size of the sound file calculated?

• Sample rate / bit depth / duration

• Sample rate x bit depth x duration

• Sample rate + bit depth + duration

• Sample rate - bit depth - duration