The influence of external and internal noise on the detection of increments and decrements in the level of sinusoids

Hearing Research
B R GlasbergR W Peters

Abstract

This paper examines the influence of external and internal noise on the detection of increments and decrements in the level of sinusoidal pedestals. In experiment 1, the pedestals were presented either 18 dB above the masked threshold in broadband noise (condition 18-Masked) or 18 dB above the absolute threshold (condition 18-Abs). Pedestal frequencies were 250, 1000 or 4000 Hz, and increment/decrement durations ranged from 5 to 200 ms. For condition 18-Masked, thresholds decreased with increasing pedestal frequency, while for condition 18-Abs, thresholds did not change significantly with pedestal frequency. These results are consistent with the idea that, in condition 18-Masked, thresholds were influenced by the inherent fluctuations produced by the background noise at the output of the auditory filter centred at the pedestal frequency. These fluctuations would decrease in rate with decreasing centre frequency, and this might have a greater deleterious effect on performance. In contrast, the characteristics of the internal noise that presumably limited performance in condition 18-Abs do not appear to vary with pedestal frequency. In experiment 2, a 4000 Hz pedestal was used. It was presented either in quiet or in the presence ...Continue Reading

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Citations

Mar 29, 2013·PloS One·Andrew J R Simpson, Joshua D Reiss
Nov 30, 2010·The Journal of the Acoustical Society of America·Jessica J MessersmithWalt Jesteadt
Jul 15, 2006·The Journal of the Acoustical Society of America·Christopher J PlackAndrew Raimond
Oct 10, 2009·The Journal of the Acoustical Society of America·Walt JesteadtStephen T Neely
Feb 1, 2013·The Journal of the Acoustical Society of America·Pete R JonesDaniel E Shub
Aug 27, 2005·The Journal of the Acoustical Society of America·Walt JesteadtDonna L Neff
Jun 27, 2002·The Journal of the Acoustical Society of America·Hedwig GockelRoy D Patterson

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