If you are using a text browser, click here to see the spectra.
Above is shown a graphic image (in .GIF format) of the spectra of the Bronchial Breathing sound file at exactly 3.674 seconds similiar to that seen by the HP Spectrum Analyzer. From left to right, each bar represents a span of 689 Hz up to 5512 Hz (half the sampling rate.) That is, the first bar is from 0 to 689 Hz, the second from 690 to 1379 Hz and so on with the last bar representing 4824 to 5512 Hz.