Question

Your ghost hunting group is recording the sound inside a haunted Stanford classroom for 20 hours as MP3 audio files. About how much data will that be, expressed in GB

Answer 1

Answer:

1.152 GB if it will be at 128 kbps quality

Explanation:

So, let's say you choose your mp3 be 128 kbps (kilobits per second).

One byte is 8 bits. So 128 kbps = 16 kilobytes per second.

There is 60*60 seconds in one hour. So 16*60*60 = 57.6 megabytes per hour

Multiply by 20 hours to get your answer: 57.6*20 = 1152 MB = 1.152 GB.

Answer 2

20 hours as MP3 audio files would be about 1.2 GB of data

MP3 audio uses about 1 MB per minute.

20 hours = 60 minutes/hour * 20 hours = 1200 minutes.

Since MP3 audio uses about 1 MB per minute, hence for 1200 minutes:

1200 minutes = 1200 minutes *   1 MB per minute = 1200 MB (1.2 GB)

20 hours as MP3 audio files would be about 1.2 GB of data

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