EMF 221.001 Week 7
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This 2 page Class Notes was uploaded by Ochi on Sunday October 11, 2015. The Class Notes belongs to 4687 at Towson University taught by Marco S. Kathuria in Fall 2015. Since its upload, it has received 32 views. For similar materials see Principles of Film and Media Production in Film at Towson University.
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Date Created: 10/11/15
EMF 22101 WEEK 7 SOUND Longitudinal wave which is an oscillation of pressure Humans perceive frequency number of wave lengthss of sound waves as pitch Sound requires an atmosphere to travel sound is measured in hertz Hz Low frequency waves low tone travels further High frequency high tone travels less more energy Amplitude loudness measured in decibelsSPL sound pressure level scale that looks at sound when measured at sea level versus everywhere else Transmuting changing energy from one form to another Analogue Digital Continuous stream of sound Divided into discreet chunks Closest to original source of sound Binary code makes it easier to record Must physically cut and paste to edit and copy Generational loss each copy loses Can edit as you please more quality No generational loss Sampling depth amount of info stored when sampled Sound Quantity Measures amplitude Measured by VU analog or LED digital green light says that recording is good red to orange means too much data too loud Signal to noise ratio SN Sound you want noise you don39t want Goal minimize of decibels to hear the true sound Headroom ampli cation of mixing board before distortion the opposite of delity occurs when equipment cannot sample fast enough so it breaks down DIRECTION of SOUND Monaural single source Stereo two sources Surround sound multiple sources Microphones Have directionality mic39s ability to sound from various directions Polar pattern Omnidirectional picks up sound from all directions captures ambient noise Unidirectional picks up sound from one direction predominantly Cardioidhyper cardioid quotshot gunquot exaggerated eliminates sound from sides and rear mostly unidirectional hyper cardioid records dialogue and picks up environment mic creates cancelling waves to environment noise Bidirectional picks up sound from 2 opposite directions use for interviews w 2 people facing ea other Lavaliere mic or quotclip micquot omnidirectional unidirectional or both Parabolic mic picks up sound from great distances