# I. Introduction

his work is able to 'Measure of hearing ability of persons using pure Tone Decay Test. Hearing ability differs from person to person. The human ear is most sensitive. Hearing problems increases with age as well as sound pollution. It results in temporary hearing loss. This can be reversed with proper medication or treatment. It occurs when there is difficulty with at least one part of the ear, resulting in an individual hearing some sounds or none at all. This study shows group people like senior citizens of our nearby area, Around 20 persons attended hearing ability test. Result shows that the peoples of this age group have different ear sensitivity. For this test ELKON EDA 3N3 AUDIO-METER is used to perform Tone Decay Test & results are concluded.


# II. Methodology

Pure tone audiometry is a procedure for determination of the extent of hearing loss and the cause, i.e. conduction or sensorineural loss. The subjects hearing threshold for acoustic stimuli of different frequencies are measured. The initial level of the stimuli is selected by the audiologist.


# a) Tone Decay Test

Of all the auditory tests designed for detection of the site of pathology in the sensorineural pathway, the tone decay test is the most commonly used, because the test can be reliably carried out on any pure tone audiometer. It has been statistically shown that pathology in the auditory nerve causes an abnormally rapid deterioration in the threshold of hearing of a tone if presented continuously to the ear. In this test, we try to quantify the deterioration in the auditory nerve. This test can be carried out with or without detecting the hearing threshold of the subject.    


# b) Overall Result for Tone Decay
![3N3D DIAGNOSTIC Audiometer" is used for this work. It is computerized device. The invention of this device is credited by ELKON COMPANY. 1. Carhart's Tone Decay Test (1957): In this Test first Select the frequency & set the intensity at 5dB SL, then .Instruct the patient to raise his hand or press patients switch as long as he hears the signal. Even if the tonality of the signal changes to buzzing sound the patient should lower his hand or release the patient signal switch. In this test the goal is to reach the intensity level at which the tone sensation & tonal quality is maintained during full 60 seconds. Result: Values above 40 dB indicate neural losses. REMARK: Intensity level at which the tone sensation & tonal quality is maintained during full 60 sec is above 40 dB. It indicates Neural Loss 2. Rosenbrg Tone Decay Method: Procedure:1. Starting intensity level is threshold.2. Stimulation is continued up to 60 sec during whichthe intensity is increased whenever the patient fails to the tone. 3. Adaptation value will correspond to the intensity increases during this one minute.](image-2.png "")
![value-0 to 10 dB decay within 60 seconds II. Cochlearlosses-15 to 20 dB decay within 60 seconds. III. Neurallosses -30 dB or greater within 60 seconds. Left Ear Treshold is 70 dB & Intensity for Tone Decay is 90 dB , therefore decay show range 30 dB.So indicates Neural Loss. 3. Owen's Tone Decay Method: It starts at Threshold; the difference is that 20 seconds rest period is advised previous to subsequently 5dB increment. Result: I. Normal Values -5dB decay II. Cochlear losses-10 to 20 dB decay III. Neural loss-25 dB or greater decay Tone decay Test for object No 3: OWEN'S METHOD Each reading has taken with 20 sec rest period, Intensity level at which the tone sensation & tonal quality is maintained during full 60 sec is above 25 dB. It indicates Neural Loss.](image-3.png "")
IV. ConclusionYear 201612Volume XVI Issue II Version ID D D D )( DMedical ResearchGlobal Journal ofNormal RangeMild LossModerate LossSevere LossProfound Loss© 2016 Global Journals Inc. (US) 1
			© 2016 Global Journals Inc. (US)
		
		
			

				


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			StanleyGelfand