add a 5 minutes wav file to test (RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, mono 11025 Hz)
tune the threashold to a nice value:0.05&2500.
move ArrayList to a local variable to clear bugs.
modify the Basic Algorithm to be OK.
rename segmentsize threashold.

Signed-off-by: samuel deng <mr.dengshuoling@gmail.com>