Acoustics is the study and analysis of sound properties. Understanding the elements of the trade allows you to create more subtle and organic soundtrack. Sound is the aural perception of vibrations. Noise is not organized or harmonious and music is organized. This is not clearly defined especially after World War 2 era, which is, known as Modernism. Post Modernism artist such as John Cage, Harry Parch, and Tan Dan set the stage. Periodic sound consists of the three P’s. These three P’s are Production, Propagation and Perception. Production is the vibrating body or mass that which energy is transferred and is the source of sound. Propagation is the medium through which the sound wave travels. Perception is the receptor of the sound. The human ear is a good example, or a microphone. These three P’s are also know as Generation, Transmission, and Reception. Psycho acoustics is the scientific study of sound, or the perception of sound. Pitch is how high or low a sound is perceived. Loudness is the subjective impression of the strength or weakness of the sound. The acoustical equivalent would be frequency and amplitude. Pitch is basically the psychological perception of how high or low a sound is. Frequency is the specific measurement of the rate of repetition of a vibrating mass. There are treble pitches, Bass pitches, Tenor pitches, and Alto pitches. Bass is Low, Tenor is low middle range, and Alto is upper middle range. The subjective perception of how loud or soft a sound is the loudness. The strength or weakness of the air pressure made by the sound can be measured and is know as the Amplitude. The magnitude is also measured and is know as the Volume. This includes Frequency, Pressure, Harmonics, and surface properties that all take place in the space for a specific length of time. Tambre quality is known for it’s rich tone and is very important in music. This can be related back to a choir of 200 or the over all quality of sound that comes from an Orchestra.