lecture21_tu4_6

lecture21_tu4_6 - 100 SIL (decibels) 100 50 0 phon 0 100...

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Music is recorded at a loud concert. You play it at home, and turn down the volume (reducing ALL frequencies by the same # of dB). How will it sound? A) Low frequencies will be over-emphasized (it will sound louder in the bass). B) Low frequencies will be under-emphasized (it would sound louder in the treble). SIL (decibels) 10k Frequency (in Hz) 100 1000 0 100 50 0 phon 100
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Phys 1240: Sound and Music Reminder: help reduce distractions during lecture Please Turn off cell phones Put away laptops Put away newspapers or other reading Stop side conversations Don’t leave in last 5 minutes of class
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www.colorado.edu/physics/phys1240 LAST TIME: Hearing and sound perception. TODAY: Standing waves, notes in music. NEXT TIME: Harmonics and spectra. READ : 7.1, 7.2 • Homework 9 and Reading Question 11 due next Thursday. • 4 new extra credit concerts added. • Gonzo the service dog is in class today. Phys 1240: Sound and Music
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Standing waves The “fundamental” vibration L Also called the "first harmonic” http://phet.colorado.edu/simulations/sims.php?sim=Wav e 29, 9, 5
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lecture21_tu4_6 - 100 SIL (decibels) 100 50 0 phon 0 100...

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