The Acoustic Dimension Sound and Synchronization Technology Evolution Recording techniques / Perception Post-Production Presentation.

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Presentation transcript:

The Acoustic Dimension Sound and Synchronization Technology Evolution Recording techniques / Perception Post-Production Presentation

What is sound Compressions and rarefactions of air pressure. Transference of energy through a medium (air).

What is sound Energy propagates through a medium Longitudinal Mechanical Wave Wave propagating in air Compressions and Rarefactions of air pressure

Transceiver based. For example: Air Pressure to Diaphragm Wave propagating in air from a transmitter (e.g. a speaker) to a receiver (microphone diaphragm)

Transceiver based. Air Pressure to Diaphragm Diaphragms can be an Ear Drum or a Microphone Dynamic Microphone Condencer Microphone Human Ear

Transceiver based. Air Pressure to Diaphragm to electric current to … Sound wave moving a microphone diaphragm resulting in a fluctuating voltage.

Air Pressure to Diaphragm to electric current to digital encoding, and visa-versa Fluctuating voltage is digitized by: 1.sample rate (48KHz) Horizontal Resolution 2.bit depth (16bit) Vertical Resolution

Digital Encoding of a Sound Wave Fluctuating voltage is digitized by: 1.sample rate (48KHz) Horizontal Resolution 2.bit depth (16bit) Vertical Resolution

Perception of Sound Psychoacoustics –the study of the relationship between physical sounds and the human perception of sound. The relationship between how our ear hears and how audio technology captures sound is not intuitive.

Perception of Sound Psychoacoustic Effects The Haas Effect (or precedence effect) –An acoustic signal that arrives first at the ear suppresses the ability to hear other signals. ~40ms. The Cocktail Party Effect –The ability in perception to select one desired sound from a background of ambient noise heard at the same time.

Elements of Sound Design ElementPerception DiageticContent AmbienceContext Sound FXVerisimilitude MusicEmotion DiffusionSpacialization / Localization