Amplification

Amplification is taking a small signal in and putting a large signal out.

## Music[edit]

Amplification is technically referred as sound reinforcement or sound enhancement. In music, it refers to the strengthening of an audio signal, whether it originates from an analog or digital device. Amplification is generally used to make a sound audible in noisy environments or to strengthen sounds from sources that are usually too quiet to be heard. Amplification allows sound engineers or musicians to artificially create audio balances which cannot be recreated naturally.

Amplification is widely used throughout contemporary and popular music. Music artists use amplification devices to achieve a richer and fuller tone from their instrument whilst recording or playing live. Electric instruments such as the bass guitar, electric guitar and keyboard are frequently amplified. Acoustic instruments such as the acoustic guitar and the voice are also amplified to gain an audio balance in a performance.

Another sort of amplification is when the music director uses smaller and smaller gestures to get more and more performance out of the orchestra and choir.[1][2]

## DNA[edit]

Kary Mullis found a way to amplify DNA in PCR.

## Notes[edit]

1. ↑ https://www.youtube.com/watch?v=neDnpgZPPvY
2. ↑ https://www.youtube.com/watch?v=_9RT2nHD6CQ