Strong strong the first and fourth harmonics the

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Unformatted text preview: f1 Quality of Sound Piano Flute The second harmonic is very The fifth harmonic is very strong strong The first and fourth harmonics The fourth harmonic is close are very similar, with the third in strength to the first being close to them String Instruments:the violin In a stringed instrument, the sound is initially produced in a string The speed of sound in the string depends on the density and tension of the string The sound of a violin The sound – and price - of a violin Antonio Stradivari 1644-1737 Giuseppe Guarneri (1698-1744). Interference in Sound Waves •  Sound from S can reach R by two different paths •  The upper path can be varied •  Whenever Δr = |r2 – r1| = nλ (n = 0, 1, ), constructive interference occurs Interference in Sound Waves, cont •  Whenever Δr = |r2 – r1| = (n/2)λ (n is odd), destructive interference occurs •  A phase difference may arise between two waves generated by the same source when they travel along paths of unequal lengths •  In general, the path difference can be expressed in terms of the phase angle...
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