GCSE J277 - 1.2.4 - Representing Sound Files

What is analogue sound?

• Recording sound as 1s and 0s
• Recording audio in a format of continuous waves

What does digital sound mean?

• Soundwaves
• Sound represented as binary values
• Sound represented as denary values
• Sound that humans emit

What does sampling rate mean?

• The number of times a digital signal is sampled per second
• The number of times sound is sampled per second
• The number of times analogue sound is sampled per second
• The unit of frequency for digital sound

What is the unit of frequency used in sound files?

• Bits
• Hertz
• Hz
• Binary

How is bit rate calculated?

• Bit Depth * Sample Rate
• Bit Depth / Sample Rate
• Bit Depth * Sample Rate * Channels
• Bit Depth * Sample Rate / Channels

MP3_1 has a sample rate of 50Hz, MP3_2 has a sample rate of 20Hz. Which is the higher quality?

• MP3_1
• MP3_2

MP3_1 has a sample rate of 50Hz, MP3_2 has a sample rate of 20Hz. Which is the larger file size

• MP3_1
• MP3_2

State a device that is used to capture an analogue sound signal

• DVD
• Keyboard
• Webcam
• Microphone

The number of samples taken per second

• Sample Rate
• Sample Duration
• Bit Depth
• Playback Quality

This is effected by the sample rate and the bit-depth

• Sample Rate
• Sample Duration
• Bit Depth
• Playback Quality