METHOD AND SYSTEM FOR CHECKING AN ACOUSTIC TRANSDUCER

摘要

The present invention relates to a method and system for checking an acoustic transducer and the audio system, wherein an inaudible silo test signal is added on top of a normal audio signal of an electronic device. A signal mix consisting of the test signal and the normal audio signal is derived and converted to a digital signal which is processed by a type of Fourier transformation, e.g. the Goertzel algorithm, to derive the magnitude of the digital signal at the test signal frequency. The derived magnitude is used to gain knowledge about the functionality of the acoustic transducer and its electrical connection to the electric device, as well as the common audio path.

主权项

1. A system for checking operability of an acoustic transducer, said system comprising:
a) a test signal generator for generating an inaudible test signal and for adding said test signal to an audio signal of said acoustic transducer and a common audio path; b) a measuring circuit for deriving and filtering from a signal of said acoustic transducer a signal mix consisting of said test signal and said audio signal; c) a converter for converting said signal mix into a digital signal; d) a frequency analyzer for deriving a magnitude of said digital signal at a frequency of said test signal; and e) an evaluator for deciding about a functionality of said acoustic transducer based on said derived magnitude.