Suprathreshold Auditory Adaptation in Normal and Pathologic Ears

1968 ◽  
Vol 11 (2) ◽  
pp. 268-278 ◽  
Author(s):  
Fred Harbert ◽  
Betty Goldman Weiss ◽  
Chester R. Wilpizeski
Keyword(s):  
Sound Pressure Level ◽  
Clinical Setting ◽  
Sound Pressure ◽  
Diagnostic Information ◽  
Pressure Level ◽  
Balance Method ◽  
Sensation Level ◽  
Frequency Sound ◽  
Auditory Adaptation ◽  
Consistent Relationship

The Wood delayed loudness balance method was studied in normal and pathologic ears to determine the characteristics of suprathreshold auditory adaptation in three groups of subjects. No consistent relationship could be established between the amount and direction of the loudness change with the frequency, sound pressure level, or sensation level of the adapting signal. Suprathreshold adaptation, as measured by the Wood method, does not provide sufficient diagnostic information to be useful in a clinical setting.

Gyro Rock Crusher and Asphalt Plant Sound Power Levels

2012 ◽  
Author(s):  
Henry A. Scarton ◽  
Kyle R. Wilt
Keyword(s):  
Sound Pressure Level ◽  
Sound Pressure ◽  
Low Frequency ◽  
Pressure Level ◽  
Sound Power ◽  
Far Field ◽  
Atmospheric Attenuation ◽  
Frequency Sound ◽  
Sound Pressure Levels ◽  
Rock Crusher

Sound power levels including the distribution into octaves from a large 149 kW (200 horsepower) gyro rock crusher and separate asphalt plant are presented. These NIST-traceable data are needed for estimating sound pressure levels at large distances (such as occurs on adjoining property to a quarry) where atmospheric attenuation may be significant for the higher frequencies. Included are examples of the computed A-weighted sound pressure levels at a distance from the source, including atmospheric attenuation. Substantial low-frequency sound power levels are noted which are greatly reduced in the far-field A-weighted sound pressure level calculations.

Fundamental frequency, sound pressure level and vocal dose of a vocal loading test in comparison to a real teaching situation

2014 ◽  
Vol 271 (12) ◽  
pp. 3263-3268 ◽  
Author(s):  
Matthias Echternach ◽  
Manfred Nusseck ◽  
Sebastian Dippold ◽  
Claudia Spahn ◽  
Bernhard Richter
Keyword(s):  
Fundamental Frequency ◽  
Sound Pressure Level ◽  
Sound Pressure ◽  
Pressure Level ◽  
Loading Test ◽  
Frequency Sound ◽  
Teaching Situation ◽  
Vocal Dose

Acoustical Characteristics of Intended Syllabic Stress in Excellent Esophageal Speakers

1982 ◽  
Vol 25 (4) ◽  
pp. 564-573 ◽  
Author(s):  
Monica McHenry ◽  
Alan Reich ◽  
Fred Minifie
Keyword(s):  
Fundamental Frequency ◽  
Long Range ◽  
Sound Pressure Level ◽  
Sound Pressure ◽  
Stimulus Item ◽  
Statistical Significance ◽  
Pressure Level ◽  
Frequency Sound ◽  
Primary Stress ◽  
The Mean

The ability of excellent esophageal speakers to manipulate acoustical characteristics associated with intended syllabic stress was studied. Five excellent esophageal speakers and five sex- and age-matched normals produced 10 sentence pairs, each containing a bisyllabic stimulus item differing only in primary stress placement. The mean fundamental frequency, sound pressure level, and duration of the stressed and unstressed vowel nuclei were analyzed. Although some differences in absolute levels were apparent, only sound pressure level differences reached statistical significance. For both groups, intended primary stress was associated with a comparable pattern of increased fundamental frequency, sound pressure level, and duration. The present findings suggest that excellent esophageal speakers are capable of producing some correlates of primary syllabic stress in a fashion remarkably similar to but somewhat less consistent than normals. The implications of these data for long-range clinical planning are discussed.

The comparative effects of signal sensation level and sound‐pressure level on interaural time discrimination

1985 ◽  
Vol 78 (3) ◽  
pp. 908-915 ◽  
Author(s):  
Marion F. Cohen ◽  
Janet Koehnke ◽  
Anne E. McClave ◽  
Patricia Gregorio Pallanck
Keyword(s):  
Sound Pressure Level ◽  
Sound Pressure ◽  
Pressure Level ◽  
Sensation Level ◽  
Time Discrimination

Managing an "Own Voice" Problem That Has an Amplifier Origin

2005 ◽  
Vol 16 (10) ◽  
pp. 781-788 ◽  
Author(s):  
Francis Kuk
Keyword(s):  
Sound Pressure Level ◽  
Sound Pressure ◽  
Hearing Aid ◽  
Low Frequency ◽  
Pressure Level ◽  
Fine Tuning ◽  
Ear Canal ◽  
Frequency Sound ◽  
Tuning Process ◽  
Voice Problem

The complaint from hearing aid wearers of hollowness in the sound of their voice is typically associated with excessive low-frequency sound pressure level (SPL) in the ear canal. Increasing the vent diameter and/or reducing the gain in the low frequency would typically minimize this complaint. This paper reports on a case where the origin of hollowness was insufficient low-frequency gain compared to a previous hearing aid fitting. It describes the systematic process that was followed in uncovering the origin of the patient's hollowness complaint. Clinicians might follow a similar objective approach in their fine-tuning process to resolve wearer complaints.

scholarly journals Clear Speech Variants: An Acoustic Study in Parkinson's Disease

2016 ◽  
Vol 59 (4) ◽  
pp. 631-646 ◽  
Author(s):  
Jennifer Lam ◽  
Kris Tjaden
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Fundamental Frequency ◽  
Sound Pressure Level ◽  
Sound Pressure ◽  
Pressure Level ◽  
Clear Speech ◽  
Frequency Sound ◽  
Acoustic Measures ◽  
Vowel Space

Purpose The authors investigated how different variants of clear speech affect segmental and suprasegmental acoustic measures of speech in speakers with Parkinson's disease and a healthy control group. Method A total of 14 participants with Parkinson's disease and 14 control participants served as speakers. Each speaker produced 18 different sentences selected from the Sentence Intelligibility Test (Yorkston & Beukelman, 1996). All speakers produced stimuli in 4 speaking conditions (habitual, clear, overenunciate, and hearing impaired). Segmental acoustic measures included vowel space area and first moment (M1) coefficient difference measures for consonant pairs. Second formant slope of diphthongs and measures of vowel and fricative durations were also obtained. Suprasegmental measures included fundamental frequency, sound pressure level, and articulation rate. Results For the majority of adjustments, all variants of clear speech instruction differed from the habitual condition. The overenunciate condition elicited the greatest magnitude of change for segmental measures (vowel space area, vowel durations) and the slowest articulation rates. The hearing impaired condition elicited the greatest fricative durations and suprasegmental adjustments (fundamental frequency, sound pressure level). Conclusions Findings have implications for a model of speech production for healthy speakers as well as for speakers with dysarthria. Findings also suggest that particular clear speech instructions may target distinct speech subsystems.

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