If you have some sort of datalogging system e.g. Pasco or Vernier, at your disposal then make the most of it but if you don"t and can"t afford one then there are some cheap alternatives available. Some are actually better than a datalogger, using Audacity for example gives a maximum sampling rate of 96,000 samples per second, rather faster than using LabPro and Audacity isn"t just cheap it"s free. Audacity is a programme...