Counts the number of Katydid chirp groups and the number of chirps per group in a .wav file.

chirp-counter.py

#!/usr/bin/env python
import sys
from pydub import AudioSegment
from pydub.silence import split_on_silence

sound_file = AudioSegment.from_wav("./wav/2021-08-03--72--002.wav")

# First chunk the audio file into groups of chirps.
audio_chunks = split_on_silence(sound_file,
    # Must be silent for a little less than 1/5th of a second.
    min_silence_len=180,

    # Consider it silent if quieter than -37 dBFS
    silence_thresh=-37
)

# Then, count the number of chirps per chunk.
pulses_string = ""
pulses_array = []
for i, chunk in enumerate(audio_chunks):

    # Save all of the chunks/groups of chirps out int their own file for debugging.
    out_file = ".//splitAudio//chunk{0}.wav".format(i)
    chunk.export(out_file, format="wav")

    pulses = split_on_silence(chunk,
        # There's usually about 40 ms between chirps.
        min_silence_len=30,

        # And it doesnt get as quiet between chirps as it does between groups/chunks of chirps.
        silence_thresh=-22
    )

    # Count and print the number of chirps in each group of chirps.
    pulses_count = len(pulses)
    print (pulses_count)

    # Make a string out of the pulses to look for patterns later.
    pulses_string = pulses_string + str(pulses_count)
    #print (pulses_string)

print (pulses_string)