In this lab, we experimented in sound manipulation. We increased/decreased the volume of a sound, made a sound play loud, and then soft, within the range of the sound, we made the sound play backwards, doubled the frequency, and halved the frequency, as well.

To show these effects, I used the sound of a man saying "This is a test". This sound is below, and is the original sound used for each of these manipulations.

Original sound

First, let's hear how it sounds when the volume of the sound is increased. The modified sound will be louder than the first.

Original sound

Sound with increased volume

Next, let's hear the sound when we make the original sound soft, then loud.

Original sound

Sound that is louder for the first half, and quieter for the second half.

Now, let's see what happens when we play the sound backwards. "This is a test" becomes "tset a si sihT", at least, when it's written. Let's hear it.

Original sound

Backwards Sound

Finally, see what happens when we change the frequency. Doubling the frequency will make the sound play twice as fast, and halving it will make it play twice as slow.

Original sound

Sound with doubled frequency

Sound with halved frequency

There you have it!

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