On this page you will found :
1. Posters from the NSL lab include :
-
Ripples in the
Anterior Auditory Field and Inferior Colliculus of the Ferret, Depireux
et al, ARO 1996 (pdf format)
-
Representation
of Complex Dynamic Spectra in Auditory Cortex, Simon et al, ISH 11
(pdf format)
-
Neuronal correlates
of Pitch in the Inferior Colliculus, Depireux et al, ARO 1997 (pdf
format)
-
Response-Field
Dynamics in the Auditory Pathway, Depireux et al, CNS 1997 (pdf
format)
-
Representation
of Comples Spectra in Auditory Cortex, Shamma et al, SFN 1997 (pdf
format)
-
Spectro-Temporal
Methods in Primary Auditory Cortex, Klein et al, ARO 1998 (pdf format)
-
A Dendritic Model
of Coincidence Detection in the Avian Brainstem, Simon et al, CNS 1998
(pdf format)
-
Representation
of Dynamic Broadband Spectra in Auditory Cortex, Shamma et al, SFN 1998
(pdf format)
-
Spectro-temporal
Modulation Transfer Functions and Speech Intelligibility, Shamma et al,
ARO 1999(pdf format)
-
Biophysical
Model of Coincidence Detection in single Nucleus Laminaris, Simon et al,
ARO 1999(pdf format)
-
Linear and
Nonlinear Responses to Dynamic Broadband Spectra in Primary Auditoty Cortex,
Klein et al, ARO 1999 (pdf format)
-
Spectro-Temporal
Processing of Dynamic Broadband Sounds in Auditory Cortex, Shamma et al,
IMA 1999 (pdf format)
-
Neural Signal and
Neural Noise in Primary Auditory Cortex, Klein et al, SFN 1999 (pdf
format)
-
Functional and
Structural Implications of Non-Separability of Spectral and Temporal Responses
in AI, Simon e al, ARO 2000 (pdf format)
-
Neural Reponse
Charateristics in Auditory Cortex of the awake Ferret, ARO 2001(pdf
format)
-
ARO-ICA 01(pdf format)
-
Comparison of
Response Characteristics in Auditory Cortex of the Awake and Anesthetized
Ferret, Elhilali et al, ARO 2002 (pdf format)
-
What
does precise spiking in AI tell us about the structure of its Receptive
Fields, Elhilali et al, ARO 2003 (pdf formart)
-
Fusion of Harmonic
Partials by Ferrets, Kalluri et al, ARO 2003 (pdf formart)
2. Papers from the NSL lab include (pdf format)
:
3. Examples of sound morphing (all .au formats)
:
To morph, we first perform a ripple decomposition, and then reconstruct.
The following is a sentence decomposed into 99 ripple components and then
reconstructed. The slight whining comes from the reconstruction.
'She had
your dark suit in greasy wash-water all year' (Female)
The same but for a male voice.
'She had
your dark suit in greasy wash-water all year' (Male)
The first sentence is morphed progressively into the second (Female
to Male).
'She had
your dark suit in greasy wash-water all year'
And now the second sentence is morphed into the first one (Male
to Female).
'She had
your dark suit in greasy wash-water all year'
4. Word morphing :
5. Examples of sound distortions:
The sound 'She
had your dark suit in greasy wash-water all year' (Female)
is distorted by:
-
Reverberation:
-
Phase Jitter
-
Linear Phase Shift
6. Examples of TORCs:
Below are 6 examples of TORCs (Temporally Orthogonal Ripple Combinations).
Each of the signals is 3 seconds long. The components tones have randomized
phases. The signals differ in either the frequency range of the component
tones or their frequency spacing or direction in which the ripples move.
TORC1:
Description:
The component tones vary from 125 Hz to 4000Hz. The modulating ripples
are upward moving.
TORC2:
Description:
The component tones vary from 125 Hz to 4000Hz. The modulating ripples
are downward moving.
TORC3:
Description:
The component tones vary from 250 Hz to 8000Hz. The modulating ripples
are downward moving.
TORC4:
Description:
The component tones vary from 500 Hz to 16000Hz. The modulating ripples
are downward moving.
HARMTORC1:
Description:
The component tones vary from 125 Hz to 4000Hz. The modulating ripples
have a frequency spacing of 50Hz.
HARMTORC2:
Description:
The component tones vary from 125 Hz to 4000Hz. The modulating ripples
have a frequency spacing of 100Hz.
7. Tools :
Most of the examples on this pages have been computed using Matlab. You
can have a look at the tools and programs we use by downloading the following
package :
Usage : This is a tar/gzip archive. Under Unix, use 'gzip -d
nsltools.tar.gz' and the 'tar xvf nsltools.tar' to install
the package.
8. HRTF Database:
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