Sound Production - What is Sound for films production

Sound effects often made by sound production company often made up using different layers of sound, sounds design is vital for films and TV. The equipment's which are use to create the sounds are; microphones to recorded, headphones to listen what you have record, the speakers or monitor with the audio visual software, some company they using sound effects from library.

The recording companies, when they planing to record the sound effects for film, they have to watch the footage and record in time with the video footage.

The recording companies listen to audio mix on various playback system analyse mix, any various audio software can be used although( Logic are industry standard) 

Amplitude is the objective measurement of the degree of change (positive or negative) in atmospheric pressure (the compression and rarefaction of air molecules) caused by sound waves. 

Sounds with greater amplitude will produce greater changes in atmospheric pressure from high pressure to low pressure.