def METHOD_NAME() -> None:
    """Test for add_noise function"""
    np.random.seed(0)
    reference = 100 * np.random.normal(size=(100, 4))
    noisy_reference = add_noise(reference, 100.0)
    assert np.mean(np.abs(noisy_reference)) == pytest.approx(109.84025018392005)
    assert noisy_reference.shape == reference.shape
    # Add 0 dB noise should not change the signal
    reference = 100 * np.random.normal(size=(100, 4))
    noisy_reference = add_noise(reference, 0)
    assert noisy_reference == pytest.approx(
        reference, rel=pytest.rel_tolerance, abs=pytest.abs_tolerance
    )