1.3.4 (f): describe the principles of operation of speakers and describe how they are applied to real-life scenarios

Definition: A device that converts electrical impulses into sound.

Sound is produced from a computer by transmitting digital values through a DAC and then through an amplifier and finally to the speaker where it is output

-The rate that the DAC can convert the digitial data into analogue voltages is known as the sampling rate. 

-If the DAC is 16-biit, it can accept 2^19 numbers. 
Then the speed that these values can be converted is the sampling rate.

-The typical sample rate is 44,100 Hz (samples per second). This means the DAC can convert 44,100 values every second.

Example:
A CD holds music files
Each music file is sampled at 44,100 times per second, each sample being 16 bits.
We must also take into consideration the music being stereophonic.
Taking the above into account, we can calculate how many bits per second can be sampled to the CD.

44,100 = sample rate
16 = sample amount of bits
2 = stereophonic so theres two sides

44,100 x 16 x 2 = 1,411,200 bits per second

8 bits = 1 byte

1,411,200 / 8 = 176,400 bytes per second