LO1:

Indoor acoustics
The principles of sound and acoustics;
Sound and acoustics have many principles, such as all properties have some sort of acoustic material inside them, which is likely to absorb, reflect, or transmit the sound. Acoustic material is designed for the purpose of absorbing sound. The studying of sound can be divided into three sections: production, transmission and reception. All of these principles are needed to allow sound to occur. Acoustic principles are now used a lot in concert halls and auditoriums.
When using a studio to record the acoustics are clear, this is because the surroundings have a low frequency and are designed to block out any audio that is not coming from within the studio. Recording in a studio is the opposite to recording in a location such as a hall, when recording it is said that the studio would be ‘dead’ as no other sounds can come in contact with the recording system other than the sounds purposely made within the studio, whereas within a hall you would usually find an echoing effect making the sound perhaps sound more distant or as if the source is travelling.
Many different surface types have different reflective and absorptive properties, for example carpet is greatly absorbent when it comes to sound proofing. Alternatively a very reflective surface for sound proofing would be plastic.

Reverberation is similar to echo in the sense that it re-creates an echo of sound that sounds like a ‘humming’ tone of the just played note(s). It is often found in modern day music such as Rock and Electro; it is the most commonly used sound effect in music.
Soundproofing is used to keep sound encased. It is often used in recording studios and cinemas as a means of keeping the outside area quieter. Common materials used for soundproofing a room are: carpet, foam, wood, fibreglass and cotton. These all have uniquely good properties for absorbing sound. However the alternative is for reflective surfaces such as: glass, metal, brick, stone and plastic.

Distortion-A distortion is the alteration of the original shape (or other characteristic) of an object, image, sound, waveform or other form of information or representation. Delay-Delay is an audio effect which records an input signal to an audio storage medium, and then plays it back after a period of time. Echo-In audio signal processing and acoustics, an echo (plural echoes) is a reflection of sound, arriving at the listener sometime after the direct sound. Wah-Wah-Wah-wah is an imitative word (or onomatopoeia) for the sound of altering the resonance of musical notes to extend expressiveness, sounding much like a human voice saying the syllable wah. Reverberation-Reverberation is the persistence of sound in a particular space after the original sound is removed. Chorus-In music, a chorus effect (sometimes chorusing or chorused effect) occurs when individual sounds with roughly the same timbre and nearly (but never exactly) the same pitches converge and are perceived as one. Phaser-The electronic phasing effect is created by splitting an audio signal into two paths.

Audio effects mk 2 from 952501