Ripple Sounds - Revision history

Lof: /* References */

2025-02-24T11:45:54Z

References

← Older revision		Revision as of 11:45, 24 February 2025
Line 174:		Line 174:
	*Escabı́, M. A., & Schreiner, C. E. (2002). Nonlinear Spectrotemporal Sound Analysis by Neurons in the Auditory Midbrain. Journal of Neuroscience, 22(10), 4114–4131.		*Escabı́, M. A., & Schreiner, C. E. (2002). Nonlinear Spectrotemporal Sound Analysis by Neurons in the Auditory Midbrain. Journal of Neuroscience, 22(10), 4114–4131.
	*https://doi.org/10.1523/JNEUROSCI.22-10-04114.2002		*https://doi.org/10.1523/JNEUROSCI.22-10-04114.2002
			*Huib Versnel and Rob van der Willigen

Lof: /* References */

2025-02-24T11:44:45Z

References

← Older revision		Revision as of 11:44, 24 February 2025
Line 173:		Line 173:
	==References==		==References==
	*Escabı́, M. A., & Schreiner, C. E. (2002). Nonlinear Spectrotemporal Sound Analysis by Neurons in the Auditory Midbrain. Journal of Neuroscience, 22(10), 4114–4131.		*Escabı́, M. A., & Schreiner, C. E. (2002). Nonlinear Spectrotemporal Sound Analysis by Neurons in the Auditory Midbrain. Journal of Neuroscience, 22(10), 4114–4131.
			*https://doi.org/10.1523/JNEUROSCI.22-10-04114.2002

Lof: /* References */

2025-02-24T11:44:17Z

References

← Older revision		Revision as of 11:44, 24 February 2025
Line 172:		Line 172:

	==References==		==References==
	*Escabı́, M. A., & Schreiner, C. E. (2002). Nonlinear		*Escabı́, M. A., & Schreiner, C. E. (2002). Nonlinear Spectrotemporal Sound Analysis by Neurons in the Auditory Midbrain. Journal of Neuroscience, 22(10), 4114–4131.
	Spectrotemporal Sound Analysis by Neurons in the Auditory Midbrain.
	Journal of Neuroscience, 22(10), 4114–4131.

Lof: /* References */

2025-02-24T11:44:03Z

References

← Older revision		Revision as of 11:44, 24 February 2025
Line 173:		Line 173:
	==References==		==References==
	*Escabı́, M. A., & Schreiner, C. E. (2002). Nonlinear		*Escabı́, M. A., & Schreiner, C. E. (2002). Nonlinear
	*Spectrotemporal Sound Analysis by Neurons in the Auditory Midbrain.		Spectrotemporal Sound Analysis by Neurons in the Auditory Midbrain.
	*Journal of Neuroscience, 22(10), 4114–4131.		Journal of Neuroscience, 22(10), 4114–4131.

Lof: /* References */

2025-02-24T11:43:37Z

References

← Older revision		Revision as of 11:43, 24 February 2025
Line 172:		Line 172:

	==References==		==References==
	~~% todo~~		*Escabı́, M. A., & Schreiner, C. E. (2002). Nonlinear
			*Spectrotemporal Sound Analysis by Neurons in the Auditory Midbrain.
			*Journal of Neuroscience, 22(10), 4114–4131.

Lof: /* Ripple functions */

2025-02-24T11:42:29Z

Ripple functions

← Older revision		Revision as of 11:42, 24 February 2025
Line 148:		Line 148:

	==Ripple functions==		==Ripple functions==
	In the biofysica toolbox in Gitlab\biofysica\experiment\sound you can find:		In the biofysica toolbox in Gitlab\biofysica\experiment\sound you can find several ripple related functions:
	* RL_generateRippleFFTtype()
	* genripple()

	===RL_generateRippleFFTtype()===		===RL_generateRippleFFTtype()===
Line 160:		Line 158:
	===createRippleSpectrogram()===		===createRippleSpectrogram()===
	The funcion createRippleSpectrogram() creates the modulation signals for different frequency bands with logarithmic spacing. It can be used by dividing a signal into bands, multiply all the bands by the rippleSpectrogram bands and create the resulting rippled signal by adding all the resulting bands.		The funcion createRippleSpectrogram() creates the modulation signals for different frequency bands with logarithmic spacing. It can be used by dividing a signal into bands, multiply all the bands by the rippleSpectrogram bands and create the resulting rippled signal by adding all the resulting bands.

			===ripplesound()===
			The function ripplesound synthesizes a ripple sound with the possibility to vary density, velocity and depth during the sound. The output has a number of elements determined by n = duration*samplerate.

			===smoothwalk()===
			The function smoothwalk() makes it possible to make a density, velocity or depth profile for the function ripplesound. It can take in a few points and outputs a smooth interpolation of those points. The output array has the length determined by n = duration*samplerate. The values for duration and samplerate must be the same for smoothwalk and ripplesound.

			===exampleDMR.m===
			The file exampleDMR.m contains three examples for use of the function ripplesound with variation in density, velocity and depth respectivily.

	==Ripple program==		==Ripple program==

Lof: /* Harmonic Complex method */

2024-09-19T12:49:29Z

Harmonic Complex method

← Older revision		Revision as of 12:49, 19 September 2024
Line 133:		Line 133:
	switch rippleType		switch rippleType
	case 'ascending'		case 'ascending'
	~~modulationMesh~~ = sin(T_phase - F_phase + phase);		modulationMaxtrix = sin(T_phase - F_phase + phase);
	case 'descending'		case 'descending'
	~~modulationMesh~~ = sin(T_phase + F_phase + phase);		modulationMaxtrix = sin(T_phase + F_phase + phase);
	end		end

	modulation = 1 + modulationDepth * ~~modulationMesh~~;		modulation = 1 + modulationDepth * modulationMaxtrix;

	% Apply modulation to carriers		% Apply modulation to carriers

Lof: /* Harmonic Complex method */

2024-09-19T12:47:14Z

Harmonic Complex method

← Older revision		Revision as of 12:47, 19 September 2024
Line 125:		Line 125:

	% Create carriers waves with random phases		% Create carriers waves with random phases
	carriers = sin(2 * pi * F .* T + phi); ~~% Use meshgrid to match dimensions~~		carriers = sin(2 * pi * F .* T + phi);

	T_phase = 2 * pi * ripples_per_sec * T;		T_phase = 2 * pi * ripples_per_sec * T;
Line 131:		Line 131:

	% Create modulation functions for frequency domain		% Create modulation functions for frequency domain
	~~% Determine ripple type~~
	switch rippleType		switch rippleType
	case 'ascending'		case 'ascending'
	~~modulation~~ = 1 + modulationDepth * sin(T_phase - F_phase + phase);		modulationMesh = sin(T_phase - F_phase + phase);
	case 'descending'		case 'descending'
	~~modulation~~ = 1 + modulationDepth * sin(T_phase + F_phase + phase);		modulationMesh = sin(T_phase + F_phase + phase);
	~~otherwise~~		end
	~~error('Invalid rippleType. Choose either ''ascending'' or ''descending''.');~~
	~~end~~		modulation = 1 + modulationDepth * modulationMesh;

	% Apply modulation to carriers		% Apply modulation to carriers

Lof: /* Harmonic Complex method */

2024-09-19T12:40:54Z

Harmonic Complex method

← Older revision		Revision as of 12:40, 19 September 2024
Line 106:		Line 106:

	This method is mathematically described on page 129 of the thesis of Lidwien Veugen.		This method is mathematically described on page 129 of the thesis of Lidwien Veugen.

			Here is a implementation in Matlab code:

	<pre>		<pre>

Lof: /* Harmonic Complex method */

2024-09-19T12:40:21Z

Harmonic Complex method

← Older revision		Revision as of 12:40, 19 September 2024
Line 143:		Line 143:

	% Sum modulated carriers across frequencies (rows)		% Sum modulated carriers across frequencies (rows)
	~~Stimulus~~ = sum(modulatedCarriers, 1);		stimulus = sum(modulatedCarriers, 1);
	</pre>		</pre>