|Acoustics of the saxophone|
Bb soprano saxophone
Notes are the written pitch.
This is the tenth note in the second register. It differs from B4 (the corresponding note in the first register) in that it uses a register hole. This causes a leak in the bore that weakens the first impedance peak, but has little affect on higher peaks – see register hole for an explanation, and compare with B4, whose impedance spectrum is almost identical except for the first peak. Above about 1 kHz, the third peak is weakened and the rest of the curve is irregular: see the discussion in cut-off frequency. Above this frequency, the spacing of peaks in the upper part of the curve roughly equals that in the curve for the lowest note, A#3. This is because, at high frequency, the wave propagates past the open tone holes, reflecting only at the bell.
Compare with the impedance spectrum for a tenor sax on written B5: same fingering but sounding one octave lower.
Sound spectrum of a Bb soprano saxophone played using fingering for B5.
For more explanation, see Introduction to saxophone acoustics.
You can hear B5 played.