def init_trial(self, trial): """Set signal for variable.""" noise_dur = 0.3 # duration of noise pause_dur = 0.03 # pause between noise and sine sine_dur = 0.015 # duration of test signal ramp_dur = 0.0075 # ramp of hann window sine_freq = 1600 # freq of test signal noise_freq = 1600 # midfreq of noise noise_band_width = 300 # bandwidth of noise # trial.test_signal = test_tone (matlab) sine_ampl = np.sqrt(2)*10**(trial.variable/20) m_test = gensin(sine_freq, sine_ampl, sine_dur, 0, trial.sample_rate) m_test = hanwin(m_test, np.round( ramp_dur*trial.sample_rate)) # generate new instance of running noise m_ref = np.random.randn(np.round(noise_dur*trial.sample_rate)) m_ref = fft_rect_filt(m_ref, noise_freq-noise_band_width/2, noise_freq+noise_band_width/2, trial.sample_rate) # adjust its level m_ref = m_ref/rms(m_ref)*10**(trial.noise_level/20) # apply onset/offset ramps m_ref = hanwin(m_ref, np.round(ramp_dur*trial.sample_rate)) pause_zeros = np.zeros(np.round(pause_dur*trial.sample_rate)) sine_zeros = np.zeros(np.round(sine_dur*trial.sample_rate)) trial.reference_signal = np.concatenate((m_ref, pause_zeros, sine_zeros)) trial.test_signal = np.concatenate((m_ref, pause_zeros, m_test))
def init_trial(self, trial): """Set signal for variable.""" trial.test_signal = np.random.randn(0.6*trial.sample_rate) trial.test_signal = fft_rect_filt(trial.test_signal, trial.frequency-50, trial.frequency+50, trial.sample_rate) trial.test_signal = trial.test_signal/rms(trial.test_signal)*10**(trial.variable/20) trial.test_signal = hanwin(trial.test_signal, 0.05) return trial