The primary output of the SpeechStation2
the spectrogram, a three-dimensional plot of frequency and spectral magnitude as a
function of time.
In the SpeechStation2,
spectrograms are displayed with 256 gray scale levels (or colors). On a typical monitor,
the default spectrogram showing two seconds of speech will contain about a thousand
spectra at 2-millisecond intervals. If the spectrogram is displayed on a typical 17-inch,
768x1024-pixel monitor, the spectrogram will be 7.5 cm (3 inches) high and about 32 cm (12
inches) long. Spectral lines will be separated by about 0.75 mm, so that spectrogram and
monitor screen are efficiently matched, and visual resolution is nearly photographic.
A selection of data window
types is provided, including Hamming, Hanning, Blackman and Rectangular, each at various
lengths. The horizontal scale can be changed extremely easily, allowing a selection (as
shown by the reversed segment at the bottom of the illustration) to be displayed as a
Printed spectrograms made with SpeechStation2
are exceptionally clear and detailed. All of the screen displays provided by the
can be printed with any Windows®-compatible printer, directly or via a local network, in
black-and-white or color.
Multiple spectrograms from
different files can be displayed simultaneously, in full scale, for precise comparison.
Spectrograms from different files can be printed separately or on the same sheet of paper.