noise_output = wave.open('noise2.wav', 'w')
noise_output.setparams((2, 2, 44100, 0, 'NONE', 'not compressed'))

values = []

for i in range(0, SAMPLE_LEN):
        value = random.randint(-32767, 32767)
        packed_value = struct.pack('h', value)
        values.append(packed_value)
        values.append(packed_value)

value_str = ''.join(values)
noise_output.writeframes(value_str)

noise_output.close()

# ----------------

noise_output = wave.open('noise.wav', 'w')
noise_output.setparams((2, 2, 44100, 0, 'NONE', 'not compressed'))

for i in range(0, SAMPLE_LEN):
        value = random.randint(-32767, 32767)
        packed_value = struct.pack('h', value)
        noise_output.writeframes(packed_value)
        noise_output.writeframes(packed_value)

noise_output.close()