Simulation of the effects of loudness recruitment and threshold elevation on the intelligibility of speech in quiet and in a background of speech

1993 ◽  
Vol 94 (4) ◽  
pp. 2050-2062 ◽  
Author(s):  
Brian C. J. Moore ◽  
Brian R. Glasberg
Keyword(s):  
Threshold Elevation ◽  
Loudness Recruitment

LOUDNESS RECRUITMENT AND VERTIGO

1959 ◽  
Vol 69 (2) ◽  
pp. 174???188 ◽  
Author(s):  
Walter Alexander
Keyword(s):  
Loudness Recruitment

scholarly journals A multi-proxy approach to assessing isolation basin stratigraphy from the Lofoten Islands, Norway

2011 ◽  
Vol 75 (1) ◽  
pp. 288-300 ◽  
Author(s):  
Nicholas L. Balascio ◽  
Zhaohui Zhang ◽  
Raymond S. Bradley ◽  
Bianca Perren ◽  
Svein Olaf Dahl ◽  
...  
Keyword(s):  
Sea Level ◽  
Threshold Elevation ◽  
Coastal Lake ◽  
New Techniques ◽  
X Ray ◽  
Lofoten Islands ◽  
Marine Influence ◽  
Bulk Organic Matter ◽  
Transitional Phase ◽  
Isolation Basin

AbstractThis study takes a comprehensive approach to characterizing the isolation sequence of Heimerdalsvatnet, a coastal lake in the Lofoten Islands, northern Norway. We use established methods and explore new techniques to assess changes in marine influence. Bathymetric and sub-bottom profiles were acquired to examine basin-wide sedimentation and a 5.8 m sediment core spanning the last 7800 cal yr BP was analyzed. We measured magnetic susceptibility, bulk organic matter properties, molecular biomarkers, diatom assemblages, and elemental profiles acquired by scanning X-ray fluorescence. These characteristics of the sediment reflect detailed changes in salinity and water column conditions as the lake was progressively isolated. Three distinct litho/chemo-stratigraphic units represent a restricted marine phase (7800–6500 cal yr BP), a transitional phase characterized by intermittent marine influence (6500–4900 cal yr BP), and complete isolation and freshwater sedimentation (4900 cal yr BP to present). Although there are uncertainties in the estimate of the threshold elevation of the lake, the timing of these phases generally corresponds with previous interpretations of the local relative sea-level history. This record captures sea-level regression following the Tapes transgression and supports the interpretation of a subsequent sea-level stillstand, dated in Heimerdalsvatnet from 6500 to 4900 cal yr BP.

Loudness Growth under Masking: Relation to True Sensorineural Impairment

1973 ◽  
Vol 16 (4) ◽  
pp. 597-607 ◽  
Author(s):  
Alan M. Richards
Keyword(s):  
Hearing Loss ◽  
Power Function ◽  
Threshold Shift ◽  
Essential Difference ◽  
Frequency Dependent ◽  
Masker Level ◽  
Loudness Recruitment ◽  
The Family ◽  
Balance Functions ◽  
Loudness Growth

Alternate binaural loudness balances between masked and unmasked normal ears were performed to examine the growth of loudness as a function of masker level at each of several frequencies (500, 1000, 2000, and 4000 Hz) and to determine whether the recruitmentlike phenomenon in masked ears is comparable in its growth and form to actual recruitment growth in sensorineural impaired ears. The results for 28 subjects indicated that for all frequencies a power function relating the perceived loudness in the masked ear to the unmasked ear could be drawn, and that the slope of this function rose as a function of increased masking. The family of slopes for each frequency was linearly related to the induced threshold shift. The slope of this latter relation proved to be frequency dependent. Comparison between the slope growth in simulated hearing loss and the family of loudness-balance slopes obtained from patients with true unilateral loss of varying degree indicated that the slopes of loudness-balance functions in the latter group also increased linearly with increased loss. In this latter instance, however, the slope growth was not frequency dependent, thus pointing to an essential difference between simulated and actual loudness recruitment growth.

Threshold elevation following adaptation to coloured gratings

1976 ◽  
Vol 16 (6) ◽  
pp. 601-607 ◽  
Author(s):  
B.N. Timney ◽  
T.A. Gentry ◽  
D. Skowbo ◽  
R.B. Morant
Keyword(s):  
Threshold Elevation

Acupuncture and Sensory Thresholds

1989 ◽  
Vol 17 (03n04) ◽  
pp. 99-110 ◽  
Author(s):  
T. Lundeberg ◽  
S. Eriksson ◽  
S. Lundeberg ◽  
M. Thomas
Keyword(s):  
Electrical Stimulation ◽  
Plasma Levels ◽  
Healthy Subjects ◽  
Pain Threshold ◽  
Sensory Thresholds ◽  
Threshold Values ◽  
Threshold Elevation ◽  
Beta Endorphin ◽  
Manual Stimulation

The effect of acupuncture on sensory thresholds was studied in 6 healthy subjects. The modes of acupuncture studied were: 1. manual stimulation, 2. electrical stimulation at 2 Hz, 3. electrical stimulation at 80 Hz. Superfiscial-acupuncture was used as placebo. Insertions of needles or application of electrodes were bilateral, at St 7 (intrasegmental) or Li 4 (extrasegmental). The study showed that manual or electro-acupuncture were effective when used intrasegmentally, raising pain threshold values 1.1 to 1.4 times that prior to stimulation. The pain threshold elevation obtained was not significantly related to plasma levels of beta-endorphin, ACTH or prolactin. Other sensory threholds, thermal, vibrotactile and electrotactile were unaffected by such conditioned sitmulation. Superfiscial-acupuncture had no significant effect on the sensory thresholds tested.

scholarly journals Noise-Induced loudness recruitment and hyperacusis: Insufficient central gain in auditory cortex and amygdala

Neuroscience ◽  
2019 ◽  
Vol 422 ◽  
pp. 212-227 ◽  
Author(s):  
Kelly Radziwon ◽  
Benjamin D. Auerbach ◽  
Dalian Ding ◽  
Xiaopeng Liu ◽  
Guang-Di Chen ◽  
...  
Keyword(s):  
Auditory Cortex ◽  
Loudness Recruitment

The Site of Binocular Rivalry Suppression

Perception ◽  
1979 ◽  
Vol 8 (2) ◽  
pp. 143-152 ◽  
Author(s):  
Randolph Blake ◽  
Randall Overton
Keyword(s):  
Visual System ◽  
Binocular Rivalry ◽  
Human Visual System ◽  
Striate Cortex ◽  
High Contrast ◽  
Threshold Elevation ◽  
Short Term ◽  
Contrast Adaptation ◽  
A Site ◽  
Lines Of Evidence

Two experiments were performed to localize the site of binocular rivalry suppression in relation to the locus of grating adaptation. In one experiment it was found that phenomenal suppression of a high-contrast adaptation grating presented to one eye had no influence on the strength of the threshold-elevation aftereffect measured interocularly. Evidently information about the adaptation grating arrives at the site of the aftereffect (presumably binocular neurons) even during suppression. In a second experiment 60 s of grating adaptation was found to produce a short-term reduction in the predominance of the adapted eye during binocular rivalry. These findings provide converging lines of evidence that suppression occurs at a site in the human visual system after the locus of grating adaptation and, hence, after the striate cortex.

Amplitude envelope cues for consonant recognition with simulated loudness recruitment

1994 ◽  
Vol 95 (5) ◽  
pp. 2991-2991
Author(s):  
Richard L. Freyman ◽  
G. Patrick Nerbonne ◽  
Diane Tharp ◽  
Emily Stanford
Keyword(s):  
Amplitude Envelope ◽  
Loudness Recruitment ◽  
Consonant Recognition
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