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In this section, we will go over the hardware implementation, including the TI TMS320C6211 DSK Board features and the microphone array.
Ti tms320c6211 dsk board
You can find a description of the board on the TI website .
To receive the signals, we decided to use the McBSP1 receive interrupt so we could read the values from our two 16 bitchannels simultaneously.
Microphone array
The microphones and the circuit
As shown in , we used two electret microphones spaced 10 cm apart. Each microphone was amplifiedwith identical non-inverting op-amp circuits ( LM386 ), as shown in . This circuit includes a low-voltage audio power amplifier and internal feedback withfixed gain.
The microphone amplifier circuit
Read also:
OpenStax, Audio localization. OpenStax CNX. Jun 06, 2011 Download for free at http://cnx.org/content/col10250/1.2
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