Research Article
A Control Source Structure of Single Loudspeaker and Rear Sound Interference for Inexpensive Active Noise Control
Table 1
Experimental instruments.
| | Loudspeaker (SPK1-3) | FOSTEX FE87E | | Microphones | Electret condenser type | | Power amplifier | TOSHIBA TA8213K | | LPF for measurements | NF ELECTRONIC INSTRUMENTS FV-664 (2 ch, 200 Hz, 24 dB/oct) | | LPF for driving | 500 Hz 4th order Butterworth | | PC | Dell PowerEdge840 (RTAI3.6.1/Linux kernel 2.6.20.21) | | A/D, D/A | CONTEC AD12-16(PCI), DA12-4(PCI) (12 bit, 5 V, 10 ) |
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