As before this attempt uses a small vibrating mass modelled on the cilia of the inner ear. The mass is set vibrating and allowed to dissipate its energy along the normal exponential curve. Two arbitrary energy levels are marked on this curve and the period of time taken to pass these two levels is measured. The assumption being that if the energy of the Hum interacts with the vibrating mass there will be a variation in the period and that this variation will be a measure of the intensity of the Hum. I found that at any specific time the period could be measured within one tenth of a second using an electronic timer and within two tenths of a second using a stop watch. I have attached an Excel file with details made over 6 days. The time is GMT and the duration in seconds and decimal parts of a second.
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duration.xls
Description: MS-Excel spreadsheet
