1. A circuit comprising: a proximity detection component configured to apply wavelet analysis to a sensed signal from a sensor to obtain a response that corresponds to modal frequencies that are excited due to proximity between the sensor and an object that causes the sensor to produce the sensed signal, wherein the proximity detection component is configured to apply the wavelet analysis by utilizing wavelet components that are adaptively variable based on a variation of a sensor-object interface; and an output indicative of whether proximity exists between the sensor and the object based on the obtained response.