Simple script for generating and playing sounds in Python 3

sounds.py

import numpy as np
import simpleaudio as sa

samplerate = 44100
ref_amplitude = 1e-5
level = 80
ref_rms = ref_amplitude / np.sqrt(2)
rms = 10 ** (level / 20) * ref_rms
amplitude = rms * np.sqrt(2)
# or more simply ...
# amplitude = 10 ** (level / 20) * ref_amplitude
duration = 1
timepoints = np.arange(0, duration * samplerate) / samplerate
frequency = 1000
phase = 0

sinusoid = amplitude * np.sin(2 * np.pi * frequency * timepoints + phase)
sound = np.fix(sinusoid * 32767).astype(np.int16)
playback = sa.play_buffer(sound, 1, 2, samplerate)
playback.wait_done()

noise = amplitude / np.sqrt(2) * np.random.normal(size=duration * samplerate)
sound = np.fix(noise * 32767).astype(np.int16)
playback = sa.play_buffer(sound, 1, 2, samplerate)
playback.wait_done()

sound = np.concatenate((noise, silence, sinusoid))
sound = np.fix(sound * 32767).astype(np.int16)
playback = sa.play_buffer(sound, 1, 2, samplerate)
playback.wait_done()

sound = sinusoid + noise
sound = np.fix(sound * 32767).astype(np.int16)
playback = sa.play_buffer(sound, 1, 2, samplerate)
playback.wait_done()