nation Audiometry Testing of Hearing Acuity: following frequencies (125 lHi nima
ID: 3523369 • Letter: N
Question
nation Audiometry Testing of Hearing Acuity: following frequencies (125 lHi nimal threshold (energy of sound wave, ázcibels or dB) for hearing in both left and right cars at the g frequencies (125 Hz, 250 1.5 U. 1000 1iz, 2000 H 4000 ad 00 ), At each frequency, you will etermine the The level below this will not be heard and the level of above will result in a greater response level at which the sound can just be heard. in the cochlea leading to a you will be able to develop frequencies of response within t he cochlea or a sense of the sound being "louder". By determining the minimal threshold an audogram that maps the function of the cochlea or the ability for the person to hear or their level of should be able to respond at energy levels of at most 50dB between 750 and 4000 Hz, normal range of Anything above this threshold level can be seen as an indication of receptor desensitization and can progress to uemey here are several factors that can lead to changes in the responsiveness of the cochlea that include, history of reflect your hearing ability due to extrancous e ankd age just to name a few), Based on noise in the lab-room, results you obtain in laboratory do not accurately Methods: 1. Follow instructions for operation of the audiometer that is provided with the audiometer 2. Use the "Manual Setting Possition your subject so that they cannot see the machine or you when you operale it. Make sure that the subject is familiar with the sound to be presented by performing a test run by setting the frequency to 1000 and the volume to 50dB. Have them 4. Test the subject's left and right cars to make sare that they understand to raise the appropriate hand when they hear the sound. .Start at a frequeney (Hz) of 125, and at random intervals, trigger the machine to send a tone at the lowest energy (dB) into the headphones of your subject. 6. If the subject hears the tone have them raise the index finger of the hand to match the side that they heard the sound. If no indicates whether they have heard them by raising the hand corresponding to the ear in which the sound was heard 7. Record energy (dB) nccessary to hear at that frequency in table I 8. Repeat steps S-7 for remain frequencies. 9. After completing all frequencies switch and repeat steps 1-8 for the other lab partner 10. Following completing tests for both partners enter data into Excel (use template provided) and graph results sound was heard, increase the energy (dB) of the sound wave to the next level and repeat steps 5 and 6 until the subject Results: Table 1. Results of the threshold energy (diB) required for interprestation of sound at various frequencies (z) during audiogram analysi Subject 2 Subject 1 Threshold Energy Threshold Energy (dB) Frequency B) 125 230 500 1000 2000 4000 8000Explanation / Answer
1-What can you determine about your ability to hear?
A pure tone audiometer can measure the softest or least audible sound that a person can hear.It can detect the tumor in and around the ear ad is very useful for post surgical prognosis.
2-What about your partner?
The hearing test is done with headphones and an audio feedback analysis system so the partners results are independent and irrespective of the other.
3-Any apparent loss is confined to one ear or both the ears?
when the apparent loss of hearing is confined to both the ears thee is middle ear or inner ear involvement or may be both. if one ear is involved the hearing capacity of one ear might surpass the other but it affects both the ear.
4-Apparent hearing loss affects which common frequencies?
NIHL-Noise induced hearing impairment is most common where most of the threshold frequency are affected at 4000Hz..and also between 3000-6000HZ.
5-WHY SO CMOMMON ? BEACAUSE OF THE THRESHOLD HEARING FREQUENCY WHIVH IS VERY COMMON.
6-SESIEURAL DEAFESS AD CODUCTIVE DEAFESS?
SESIEURAL DEFECT-HEARIG LOSS CAUSED BY DAMAGE TO VESTIBULOCOCHLEAR NERVE.
CODUCTIG HEARIG LOSS- CAUSED BY THE DAMAGE TO THE EARDRUM OR OSSICLE .
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.