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The Acoustic Dimension

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.

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The Acoustic Dimension

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

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

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

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

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

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

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

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

  9. 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.

  10. Perception of SoundPsychoacoustic 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.

  11. Elements of Sound Design

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