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In Class Lecture for 6a

Terms in this set (29)

Non-target pulse rates: 6.3, 8.3, 10, 12.5, or 14.3 p.p.s.

Target Pulse Rate: 20 p.p.s.

These measurements were taken on the 8th day of training (1 week after end of noise exposure) at suprathreshold.

Rate differences between target and non-target pulses are increases along the x-axis. As these are increased, the performance scores increases.

The results showed that a 2-month-long exposure to moderate-level structured noises significantly degraded these adult animals' abilities to discriminate between sound stimulus rates. This effect persisted for at least 6 weeks after the end of the noise exposure.

X-Axis is the rate difference between the target and non-target rate. So, if there is a difference of the two pulse trains is 14 PRR that means there were 14 more pulses for the target pulse train than for the non-target pulse train. When there was a bigger difference, there was better performance.

This is measuring the rat's ability to differentiate between the pulse train rate.

Take Away: Having significant noise exposure will impact your auditory perception abilities even in ideal listening situations (easier listening situations). Temporal discrimination ability is impeded in the group that has noise exposure. The temporal discrimination ability is significantly hampered in the group that has noise exposure.


So, how does this relate to real life?
Being able to have frequency discrimination is that we discriminate frequency by the timing of the wave or the period of the wave. Frequency is the basis of communication. Different consonants are differentiated by frequencies. If you cannot differentiate between frequencies because you can discriminate between timing, then your perception of speech will be hindered.