Noise Dosimeters are used to measure the cumulative noise does in terms of a weighted sound energy over a period of normal working day for the purpose of assessing hearing damage risk. Noise dosimeters integrate the noise level near the ear of a person over an entire day and provide information about the total noise exposure in a single measure, thus similar to radiation dosimetry. Dosimeters are a form of sound level meter that have a DC output signal that is converted into a series of impulses, which are counted to provide a measure of the noise dose. Dosimeters are designed for individuals who are exposed to varying levels of high-intensity noise; thus they are small in size and simple to operate with a microphone that can clip on to the lapel of a coat of shirt. Dosimeters are capable of providing the user with information in the form of statistical parameter as well as the peak level over any predetermined increment of time and thus provide a time history of the noise exposure.