The automatic tone decay test as part of dynamic measurement of threshold

1980 ◽  
Vol 226 (3) ◽  
pp. 155-160
Author(s):  
E. Lehnhardt ◽  
R. D. Battmer
Keyword(s):  
Dynamic Measurement ◽  
Decay Test ◽  
Tone Decay

Tone Decay Test in Neuro-Otological Diagnosis

1972 ◽  
Vol 96 (3) ◽  
pp. 231-247 ◽  
Author(s):  
C. Morales-Garcia ◽  
J. D. Hood
Keyword(s):  
Decay Test ◽  
Tone Decay

Unusual Findings in a Bekesy Audiogram

1972 ◽  
Vol 37 (1) ◽  
pp. 132-137
Author(s):  
L. J. Upfold
Keyword(s):  
Acoustic Neuroma ◽  
Fixed Frequency ◽  
Sweep Frequency ◽  
Decay Test ◽  
Tone Decay ◽  
The Difference ◽  
Unexpected Findings ◽  
Short Time

Details are presented of a case of acoustic neuroma in which there was a discrepancy between Bekesy sweep-frequency results and those of fixed frequency traces and a tone-decay test. A series of Bekesy fixed frequency traces produced the unexpected findings that frequencies at which adaptation does and does not occur can show bizarre patterns; that the difference between adapting and nonadapting frequencies can be quite small; and that adaptation at a given frequency can vary over a short time. It is suggested that more attention be given to Bekesy fixed frequency tracings when adaptation is not displayed in sweep-frequency tracings.

scholarly journals Recruitment Phenomenon and Tone Decay Test

1996 ◽  
Vol 7 (2) ◽  
pp. 242-250
Author(s):  
Sang Heun Lee
Keyword(s):  
Decay Test ◽  
Tone Decay

Hearing Dysfunction Associated with Congenital Sporadic Hypothyroidism

1974 ◽  
Vol 83 (6) ◽  
pp. 814-819 ◽  
Author(s):  
M. Rubenstein ◽  
C. Rubenstein ◽  
R. Theodor
Keyword(s):  
Hearing Loss ◽  
Nerve Conduction ◽  
Guinea Pigs ◽  
Evoked Response ◽  
Continuous Treatment ◽  
Conduction Time ◽  
Essentially Normal ◽  
Decay Test ◽  
Tone Decay ◽  
Evoked Response Audiometry

A study of the effect of congenital sporadic hypothyroidism (CSH) on hearing dysfunction was undertaken. Fifteen female and six male CSH patients were evaluated audiometrically. All of these patients had a protein bound iodine quotient (PBI) of less than 4 mg% at the time of diagnosis and were currently under treatment. The patients ranged in age from four and one-half years to 40 years old; eight had sensorineural hearing loss; three had mixed hearing loss; only two had conductive loss and eight had essentially normal hearing. Special audiometric studies were performed including SISI, Rosenberg threshold tone decay, Békésy tracings, and evoked response audiometry (ERA). The SISI and tone decay test results were equivocal. However, statistically abnormal Békésy tracings, with unusually wide excursions were noted. This may be explained by a prolonged nerve conduction time. Evoked response audiometry, which is objective and is independent of cortical neuromuscular function, demonstrated that the unusually wide Békésy excursions were not the result of sluggish motor responses alone. A statistically significant prolonged latency period measured by ERA (without sedation) was found in four patients who were under compensatory hormonal treatment. A parallel preliminary animal experiment was performed in an attempt to confirm these clinical ERA findings. Guinea pigs were induced to hypothyroidism by propylthiouracil. After two months of continuous treatment the ERA was measured. All six guinea pigs had prolonged nerve conduction times at two frequencies. The latency periods were generally 2.5 to 3 times greater than control guinea pigs. A case report is presented of a patient who developed increased hearing loss when replacement therapy was stopped. The hearing levels improved when a euthyroid state was medically reestablished. The results of ERA and Békésy tracings suggest that abnormally prolonged nerve conduction time can play an important role in the hearing dysfunction of CSH patients.

The Tone Decay Test

1969 ◽  
Vol 68 (1-6) ◽  
pp. 33-42 ◽  
Author(s):  
K. Gjévenes ◽  
Th. Söhoel
Keyword(s):  
Decay Test ◽  
Tone Decay

THE TONE DECAY TEST ??? A SIMPLE AND RELIABLE AUDIOLOGICAL TEST

1969 ◽  
Vol 79 (11) ◽  
pp. 1879-1890
Author(s):  
P L BHATIA ◽  
A Sinha ◽  
B M Abrol
Keyword(s):  
Decay Test ◽  
Audiological Test ◽  
Tone Decay

A Simplified Tone Decay Test

1975 ◽  
Vol 101 (7) ◽  
pp. 403-407 ◽  
Author(s):  
J. Jerger ◽  
S. Jerger
Keyword(s):  
Decay Test ◽  
Tone Decay
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