Wave Physics PHYS 2023 Tim Freegarde 2 Spectrum periodic waveform can be expressed as a...
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Wave Physics PHYS 2023 Tim Freegarde
Wave Physics PHYS 2023 Tim Freegarde 2 Spectrum periodic waveform can be expressed as a superposition of harmonics amplitude or intensity commonly represented
2 Spectrum periodic waveform can be expressed as a
superposition of harmonics amplitude or intensity commonly
represented by spectrum
Slide 4
3 Spectrum periodic waveform can be expressed as a
superposition of harmonics commonly represented by spectrum often
plotted on log-log or lin-log scales
Slide 5
4 Spectrum periodic waveform can be expressed as a
superposition of harmonics commonly represented by spectrum often
plotted on log-log or lin-log scales may be plotted with frequency
axis upwards...... with marks for integer...... and time on the
horizontal axis
Slide 6
5 Boundary conditions for a boundary at : transverse waves on a
string: fixed point sound waves in organ pipe:water waves:thermal
waves:electromagnetic waves: wall since lagged end conductor open
stopped thermal reservoir
Slide 7
6 Open organ pipe first six harmonics lie on major chord J S
Bach Toccata & Fugue in D minor BWV565
Slide 8
7 Stopped organ pipe even harmonics are absent register key
raises by a twelfth CLARINET:
Slide 9
8 Oboes and saxophones even harmonics are present register key
raises by a twelfth CLARINET: register key raises by an octave
SAXOPHONE:
Slide 10
Wind instruments
Slide 11
10 Spectrum periodic waveform can be expressed as a
superposition of harmonics commonly represented by spectrum often
plotted on log-log or lin-log scales may be plotted with frequency
axis upwards...... with marks for integer...... and time on the
horizontal axis