sine_wave_generator

sine_wave_generator(fs, d, freq, spl_level)

Sine wave signal generation

This function creates a sine wave signal given a sampling rate, duration, frequency and sound pressure level.

Parameters:

• fs (int) – Sampling frequency in [Hz].

• d (int) – Signal duration in [s].

• freq (int) – Sine wave frequency in [Hz].

• spl_level (int) – Sound pressure level signal in [dB SPL].

Returns:

• signal (array_like) – Signal time values in [Pa].

• time (array_like) – Time axis in [s].

Warning

spl_level must be provided in dB, ref=2e-5 Pa.

Notes

Signal to be used for ECMA-418-2 validation must have a sampling frequency of 48 kHz.

Examples

>>> from mosqito.utils import sine_wave_generator
>>> import matplotlib.pyplot as plt
>>> import numpy as np
>>> fs = 48000
>>> duration = 1
>>> freq = 10
>>> dB = 60
>>> signal, time = sine_wave_generator(fs, duration, freq, dB)
>>> plt.plot(time, signal)
>>> plt.xlabel("Time axis [s]")
>>> plt.ylabel("Amplitude signal [Pa]")

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