R093 file formats

A microphone converts the changes in air pressure into voltage changes which are then digitised.

• True
• False

The following is true about sample rates:

• They measure a number of snapshots of sound taken per second.
• They are not as important as bit rates.
• They are different for every song, depending on its loudness.

Lossy compression works by identifying sound frequencies that are not obvious and deleting them.

• True
• False

What is the process called for  converting analogue sound into binary (digital format)?

• Conversions
• Sampling
• Bit Rate
• Converting

The frequency of the sound is also known as the what?

• Court
• Pitch
• Tone
• Speed

What is bit depth?

• Number of bits assigned to each sample
• Rate at which the binary is calculated
• How deep the sound can go
• The speed of the sound wave

What is the sample rate?

• The number of times a sound wave is sampled per second

• The number of bits used to store each sample

• How loud a sound is

• The size of the sound wave

Image file that uses up to 16 million colors.  It is the most common format for storing and transmitting photographic images.

• PNG
• JPG
• TIF
• GIF

Type of compression that deletes or changes some pixels while making the file size smaller.

• Lossless compression
• Lossy compression

.MP3 is what kind of file?

• Sound

• Video

• Image

• Web page