Creative Structures-Lec2

Creative Structures-Lec2 - Nature of Sound Goals How sound...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Nature of Sound Goals How sound works How sound is measured Basic Acoustics Sound is Disturbance in air pressure Compression—high pressure Rarefaction—low pressure Speed of sound 1130 ft/sec in air 770 MPH Frequency # of cycles per second Measured in Hertz Frequency changes=pitch changes Human 20Hz to 20k HZ 2k-4k is human sweet spot vocal pattern Dogs 15Hz-50k Hz Cats 60Hz-65k Hz Bats 1kHz-120k Hz RTA—Real Time Analyzer Amplitude Loudness Human Range -1/4dB to 140dB decibels 0dB is not silence 0dB is .0002ubar of air pressure 0dB is the reference for dBs Every 10dB is 10x the power Every 3dB doubles
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
0dB threshold of Hearing 10-20dB rustling leaves 30dB Whisper @ 1 meter 60dB Conversational speech @ 1 meter 90dB heavy Traffic…damage begins here 120dB Rock Concert 140dB Threshold of Pain 150dB Jet Engine @ 30 meters 180dB Rocket Launch @ 45 meters SPL Meter Sound Pressure Level Waveforms Simple Waves: Synthetic Phase Timing difference between 2 waves Measured in degrees Waves interfere
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

Creative Structures-Lec2 - Nature of Sound Goals How sound...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online