Active noise control with on-line-filtered C modeling
AssigneeSiemens VDO Automotive Corporation
InventorsRichard D. McWilliam, Ian McLean
Life of this patent
Estimating the term…
Abstract
A method of noise attenuation for a vehicle comprises generating a noise attenuating sound based on an assumption through speaker 18. (See FIG. 1). A test signal is generated comprising a frequency range of sounds desired to be attenuated for obtaining actual data. The test signal is received by microphone 26 and then filtered by filter 30. The assumption is then assessed based upon the filtered received test signal. The noise attenuating sound 32 is altered based on the assessment.
Claims20
A method of noise attenuation for a vehicle engine, comprising the steps of:
- generating a noise attenuating sound based on an assumption;
- generating a test signal comprising a frequency range of sounds to be attenuated;
- receiving the test signal;
- filtering the received test signal;
- assessing the assumption based on the filtered received test signal;
- and
- altering the noise attenuating sound based on the assessment wherein filtering the received test signal comprises filtering a background noise from the test signal.
A method of noise attenuation, comprising the steps of:
- generating a noise attenuating sound based on an assumption;
- generating a test signal;
- receiving the test signal;
- filtering the received test signal;
- assessing the assumption based on the filtered received test signal;
- and
- altering the noise attenuating sound based on the assessment.
A noise attenuation system for a vehicle, comprising:
- a speaker;
- a control unit controlling said speaker to create a noise attenuating sound;
- a microphone in communication with said control unit;
- and
- a filter in communication with said microphone and said control unit for filtering sounds received by said microphone.
Dependencies are inferred from the claim text.