SOUND


Lyd   -  form (longitudinal-compr / transverse-shear)
      -  egenskaper 20-20K Hz, freq., wavelength, period, amplitude,
         intensity, speed, direction
      -  acoustics
      -	 noise
      -  in gases, in solids (not in vacuum)
      -  sound pressure (dB)
      -  stereo / multi channnel
      -  dynamic range
      -  physical phenomena producing sound (fire, wind, earthquakes,
         etc.)
      - doppler effect

Listening

      - perception (stereo, diaphragm, sinuses)
        part of perceptual system with eyes, touch, smell and taste
      - brain sound processing
      - self dampening when speaking
      - hearing aids
      - hearing damage (120 short term / 85 long term / pain 120dB)
      - the ear is made to survive and we do our best to destroy it
      - it's a safety system

Making

      - speech, animal sound organs (frogs, whales, birds)
      - musical instruments
      - sonar
      - ultralyd, lyd, infralyd
      - ultralydrensing 
      - språk
      - music

Environment

      - acoustics 
        cause - generating mechanism (transduction) -
        propagation - reception (transduction)
      - trinnlyd / luftbåren lyd
      - materials (hard, soft, suspension)
        for generating
	for absorbtion
	frequencies
      - volume
      - form (auditoria, acoustic reflectors, etc.)
      - the under water world / ground (elephants)	

Insulation

      - mass
      - material
      - suspension

Technology

      - history
        notes and instruments, pianola, music boxes, phonograph, wire,
        tape, digital, solid state. 
      - recording
        distance, sound pressure, gain, environment, quality
        microphones (throat, air, bone)
      -	clipping / gain /distance
      - mono / stereo / multi channel
      -	recording formats
      - compression
      - playback
      - noisecancelling
 
Programvare

      - QuickTime player
      - Audacity


Examples (Damascus / Beirut / Tripoli)
          svarttrost (http://abdallah.hiof.no/trost/)
          lyder i forskjellige omgivelser (http://abdallah.hiof.no/dmpro/digdok-2009/sounds.html)


URLs  - http://www.pianola.com/
      - http://www.pianola.org (mp3)
      - http://en.wikipedia.org/wiki/Sound
      - http://en.wikipedia.org/wiki/Music_box