License : Free
Price : Free
Some sound files in WMA format are included to help you calibrate your headphone, loudspeaker, headphone, Hi-Fi and related audio equipment.
To use the files, select it in a Media Player. Also select looping or repeating mode of playback. Then you can begin to play the sound file. Most players create an artificial silent time between repetitions. The ears can detect this easily. But the program can skip over the silent period if we choose the long-time average mode. For accurate frequency measurement, the narrow band analysis should be used. However, the wider shape of spectral peaks for wide band analysis makes peaks easy to identify and measure.
Normally, you will connect your earphone output to the audio equipment under test. Then you bring the pocket PC near the speaker of the system, and run a spectrum or spectrogram display program while the Media or MP3 Player is running in the background. Some Media Players any not be able to produce continuous sound even within the time span of the sound file, which cannot be used.
All sound test files consist of stable pitch tones. They create concentrated spectral energy far above the background white noise level. Therefore, accurate measurements can be made without special noise control. For measurements with fixed pitch tones, long time averaging can be used to provide a very stable spectrum display and provides further noise rejection. A good real-time spectrum analyzer like the HandDee-SA makes this possible.
Mirror 1 | Mirror 2
Price : Free
Some sound files in WMA format are included to help you calibrate your headphone, loudspeaker, headphone, Hi-Fi and related audio equipment.
To use the files, select it in a Media Player. Also select looping or repeating mode of playback. Then you can begin to play the sound file. Most players create an artificial silent time between repetitions. The ears can detect this easily. But the program can skip over the silent period if we choose the long-time average mode. For accurate frequency measurement, the narrow band analysis should be used. However, the wider shape of spectral peaks for wide band analysis makes peaks easy to identify and measure.
Normally, you will connect your earphone output to the audio equipment under test. Then you bring the pocket PC near the speaker of the system, and run a spectrum or spectrogram display program while the Media or MP3 Player is running in the background. Some Media Players any not be able to produce continuous sound even within the time span of the sound file, which cannot be used.
All sound test files consist of stable pitch tones. They create concentrated spectral energy far above the background white noise level. Therefore, accurate measurements can be made without special noise control. For measurements with fixed pitch tones, long time averaging can be used to provide a very stable spectrum display and provides further noise rejection. A good real-time spectrum analyzer like the HandDee-SA makes this possible.
Mirror 1 | Mirror 2