How is a psychophysical tuning curve measured?
Psychophysical tuning curves (PTCs) are usually measured by determining the level of a narrowband noise required just to mask a fixed,’ low-level tone, for several masker centre frequencies.
How is a tuning curve measured?
Abstract. The ‘fast’ method for measuring psychophysical tuning curves (PTC) uses a masker that sweeps across frequency and a Békésy threshold tracking procedure. The fast-PTC procedure has been recommended as a technique for diagnosing cochlear dead regions in adults.
What is a psychophysical tuning curve?
A psychophysical tuning curve (PTC) shows the relationship between the level and frequency of a pure-tone masker (see auditory masking) that is necessary to just mask a probe signal of fixed level and frequency. PTCs bear a strong resemblance to the actual tuning curves measured in auditory nerve fibers.
Why do we measure neural tuning curves?
Tuning curves are widely used to characterize the responses of sensory neurons to external stimuli, but there is an ongoing debate as to their role in sensory processing.
What is a threshold tuning curve?
These threshold functions are called tuning curves, and the lowest threshold of the tuning curve is called the characteristic frequency. Since the topographical order of the characteristic frequency of neurons is retained throughout the system, information about frequency is also preserved.
What is a frequency tuning curve?
The tuning curve of the cochlea measures how large an input is required to elicit a given output level as a function of the frequency. It is a fundamental ob- ject of auditory theory, for it summarizes how to infer what a sound was on the basis of the cochlear output.
What do tuning curves tell us about VIIIth nerve fibers?
Figure 3 displays tuning curves for different auditory nerve fibers in the VIIIth nerve. Each tuning curve displays the sound level required to increase neural firing rate a threshold amount above spontaneous rate as a function of frequency.
What is frequency tuning?
1. Changing the frequency of operation for a radio system through mechanical or electrical means. Learn more in: Compact and Efficient Reconfigurable Antennas for Flexible Radio Front-End in Cognitive Radio Systems.
What is a tuning function?
The tuning function is the link between the stimulus (here the direction and speed. ) and the activity of the simulated neurons. The value of the tuning function multiplied with the size of the time-window acts as expectation value for the Poisson process.
What is auditory tuning?
In auditory system, tuning curve identifies the response of one or some neurons for sound stimuli at different frequencies-intensity combinations. The frequency, which creates responses in minimum intensity, is called Characteristic Frequency (CF).
What are auditory curves?