Flashcards
Acoustics 1
Cards in this deck (17)
- 1What Is Sound?A Longitudinal Wave Disturbance In Any Compressible Substance (Especially Air)
- 2What Is Sound To Us?The Perceptual Object "Heard" In The Brain When These Waves Stimulate The Human Ear
- 3Sound Production Sound Propagation Sound PerceptionHow Sound Is Created (Vibrations)
How Sound Travels Between Places (Waves)
How It effects The Senses And Emotion Of The Listener - 4Longitudinal Waves Transverse WavesWave Motion and Particle Motion are Parallel To Each other. Also Known As Compression Waves
Wave Motion and Particle Motion are Perpendicular To Each Other. - 5Compression RarefractionWhen the waves are closer then average
When the waves are further away then average - 6WavelengthThe Distance From The Start Of One Complete Wave To The Start Of The Next
- 7Speed of Sound At (T=20) in dry airAir = 344m/s
CO2 = 270m/s
Helium = 1000m/s
Water = 1500m/s
Steel = 6000m/s - 8Increase In Sound Speed For Every Degree Increase0.6m/s
At Higher temperatures random molecule motions are faster causing the sound disturbance to pass on quicker - 9Sound AmplitudeMeasure of The Strengh of Sound
- 10Displacement AmplitudeDistance each bit of air moves to either side from its normal position during vibration
- 11Pressure AmplitudeMaximum increase of air pressure above normal atmosphere pressure in a sound wave compression
Very Small differences but can be picked up by a microphone - 12Timescales of Musical EventsLong - Several second to Hours
Medium - Fractions of a second to several seconds
Short - Individual Vibrations (Can be millionths of seconds) - 13FrequencyThe repetition rate of a vibration measure in HZ or Cycles per second
Concert Pitch is A440HZ - 14Sinusoidal MotionA Fixed periodic motion where amplitude and time are constant.
- 15ExcitationExciting an instrument/The Motion which sets the sound in motion
- 16TransientA Sound That is not sustained
- 17Periodic SoundA Sound which has a constant wave such as a synth
Information
- Description
- Audio Production Theory Flashcards on Acoustics 1, created by Christopher Moore on 15/01/2020.
- Created by
- Christopher Moore
- Views
- 2
- Tags
- Rating