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Counting beeps at start of a WAV file?

Mar 18 at 1:38 PM
I'm totally new to the audio processing area so am hoping this won't be too painful. I need to count a series of beeps at the start of a .wav file and the end time of the last beep in the series. Beeps are 3300Hz and150ms length with a 150ms delay in between. I looked through the SampleAggregator class in the demo but am a bit stumped with what to do with it and what a FFT does. File details below.

Opening C:\Video Analysis\REC004.wav
Pcm 16000Hz 2 channels 16 bits per sample
Extra Size: 0 Block Align: 4 Average Bytes Per Second: 64000
WaveFormat: 16 bit PCM: 16kHz 2 channels
Length: 43268808 bytes: 00:11:16.0750000
Chunk: LIST, length 26
49 4E 46 4F 49 53 46 54 0E 00 00 00 4C 61 76 66 35 37 2E 35 36 2E 31 30 30 00