If you would like to learn (or teach) the fundamentals of vibration and the more advanced signal processing topics, we believe iLearnSignals will prove an indispensable asset. iLearnSignals is a combination of spectrum analyzer and signal generator. You can build your own signals, or select from the many simulations.  For example, you can start with a basic signal and add noise, or you can start with a simulation of a bearing fault.   You can also view real data samples, chosen to demonstrate important topics such as averaging, integration and windowing. iLearnVibration is a very easy program to use. You can keep it simple, or use it to help you understand some of the more complex topics. To learn more about this product, you can request a demonstration CD, or take a tour of the products.