Sig++ Online Commands
periods (source code)

Generates a specific number of periods for a sinewave windowed by a sine-squared window to minimize noise effects. Used to measure the minimum number of sinewave cycles needed to perceive a pitch. About 7 +/- 2 cycles of a sinewave are needed to define a pitch.

Click on the submit button below to process the options given in the section below.

Output soundfile format:

Frequency of sinewave [0-22050 Hz]:

Number of periods [1-100000 cycles]:

Maximum amplitude of sinewave in the range from -1.0 to 1.0:


Here is the waveform of a 4-cycle sinusoid multiplied by a sine-squared window: