Electrical audio signal processing systems and devices – Monitoring/measuring of audio devices – Loudspeaker operation
Reexamination Certificate
2006-09-12
2006-09-12
Chin, Vivian (Department: 2615)
Electrical audio signal processing systems and devices
Monitoring/measuring of audio devices
Loudspeaker operation
C381S111000, C381S058000
Reexamination Certificate
active
07106865
ABSTRACT:
A speaker (100) having a diagnostic capability, as well as a circuit (101) and related methods (500) for performing speaker diagnostics based upon a driving-point impedance are provided. The speaker includes a flexible cone (104) and a voice coil (106) connected to the flexible cone for driving the flexible cone so as to convert electrical signals into sound. The speaker also includes a signal source (110) connected to the voice coil for supplying a test signal to the voice coil. The speaker further includes a signal sensor (112) electrically connected to the voice coil for sensing a response signal occurring in response to the test signal. Additionally, the speaker includes a condition determining module (114) for determining a driving-point impedance based upon the response signal and for comparing the driving-point impedance to a predetermined impedance to thereby determine a condition of the speaker.
REFERENCES:
patent: 6064742 (2000-05-01), Landelius
patent: 6879693 (2005-04-01), Miller et al.
patent: 2005/0175195 (2005-08-01), Cheney et al.
McIntosh Jason D.
Pavlov Peter M.
Yeager David M.
Chin Vivian
Kurr Jason
Motorola Inc.
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