Impedance sensing for speaker characteristic information

摘要

Speakers (e.g. “loudspeakers”) from different manufactures may have differing characteristics. In order to improve audio performance, an audio system may customize audio settings based on characteristics of an attached speaker. Described is a technique for determining speaker characteristics by sending a signal through a filter of the attached speaker. The signal may be a probing signal that produces no audible effect from the speaker. The signal may progress through one or more frequency ranges and an impedance signature may be measured. When the signal progresses through a frequency range, the impedance may be measured and a speaker model type and/or characteristics or condition of the speaker may be determined based on the measured impedance.

主权项

1. A method of determining characteristics of a speaker, comprising:
sending a probing signal through a filter of the speaker, the probing signal progressing through a frequency range and producing no audible effect from the speaker; measuring an impedance signature generated by the filter during a duration of the signal; and determining a characteristic of the speaker based on at least one impedance peak of the measured impedance signature.