The classification of ringing sounds

The problem of ringing sound (e.g. telephone, alarm clock, etc.) classification is addressed. A time-domain model, exhibiting the phenomenon of interference is found to have behavior similar to that exhibited by a telephone ringing sound. This motivates a frequency-domain production model which asserts that ringing sounds can be modeled as bandpass-filtered white noise, where the filter has a power spectral density in the form of isosceles triangles. A parameter estimation technique based on this model is found to provide enough information to classify ringing sounds