Samples List and Instructions

What is a sample?

In order to store , display, and modify vibration signals on a digital computer, the signals must be digitised. This is done through two processes known as sampling and quantisation, collectively known as analog-to-digital (A/D) conversion by convention. The samples presented here are the vibration data from an accelerometer and recorded using a soundcard , as outlined in our test method .

How do I download these samples?

Simply click on an .wav file name to download it.

If you have the problem of your browser not requesting a location to save the file but instead it plays the .wav file, then you have to alter your browser setup. In the case of Netscape,

• From the menu, select Options|General Preferences....
  This will bring up the General Preferences Panel.
• Select the Helpers tab on this General Preferences Panel.
  This will bring up the helpers panel.
• Select the Create New Type... button.
  This will bring up a new dialogue box.
• Type application into the Mine Type field. Then type wavfile into the Mine SubType field. Finally, select the OK button. You will be taken back to the helpers panel.
• On the helpers panel enter wav at the File Extensions: line.
• Change the current Action to Save to Disk. Once all changes are entered, select the OK Button.
  This will mean that once an mfile is selected from below, you will be prompted to give a saving location on your disk.

How do I analyse these samples?

Download the wave analysis m-file from the M-file List . This performs an FFT on the vibration data and displays the spectrum of the data.

See also the Analysis of Example Data .

What samples are available for download?

angd.wav

Angle Grinder (274 kB, 16bit mono, 22kHz)

drill.wav

Drill (258 kB, 16bit mono, 22kHz)

blwr1.wav

Garden Blower, sample 1 (296 kB, 16bit mono, 22kHz)

blwr2.wav

Garden Blower, sample 2 (247 kB, 16bit mono, 22kHz)

blwr3.wav

Garden Blower, sample 3 (253 kB, 16bit mono, 22kHz)

blwr5.wav

Garden Blower, sample 5 (188 kB, 16bit mono, 22kHz)

lawn.wav

Lawn mower, sample 1 (301 kB, 16bit mono, 22kHz)

lawn2.wav

Lawn mower, sample 2 (307 kB, 16bit mono, 22kHz)

lawn3.wav

Lawn mower, sample 3 (237 kB, 16bit mono, 22kHz)

lawn4.wav

Lawn mower, sample 4 (161 kB, 16bit mono, 22kHz)

idle1.wav

Car engine, sample 1 (116 kB, 16bit mono, 22kHz)

idle2.wav

Car engine, sample 2 (115 kB, 16bit mono, 22kHz)

rev1.wav

Car engine, sample 3 (64 kB, 16bit mono, 22kHz)

rev2.wav

Car engine, sample 4 (82 kB, 16bit mono, 22kHz)

rev3.wav

Car engine, sample 5 (89 kB, 16bit mono, 22kHz)

start.wav

Car engine, sample 6 (96 kB, 16bit mono, 22kHz)

stop.wav

Car engine, sample 7 (58 kB, 16bit mono, 22kHz)