Audiometry Lab Report Example | Topics and Well Written Essays - 500 words

Audiometry - Lab Report Example It also assists in assessing the nature, degree, and probable cause of the hearing impairment of s patient. The pure tone audiometry is used in determining the threshold of hearing of the patient. This is defined by the lowest hearing level at which the patient responds at least 51% of the time to auditory stimuli. These thresholds are found using procedures as recommended by the American Speech-Language-Hearing Association. Pure tone threshold testing should be handled in a sound controlled room. This will help in avoiding masking by unacceptable noise levels in the room. An audiogram is composed of three main parts namely, pure tone testing that determines ability to detect sound, and speech testing determines ability to decode sound, and tympanometry which helps in defining where the problem is. The normal hearing ability ranges between 10 - 25 dB HL while for serve cases it ranges between severe 70 - 85 dB HL. For the first patient, the left ear, frequencies between 0-2000(Hz), the hearing ability ranges between -20—50dBHL. As the rate increases past 2000 Hz, the hearing ability increases from -30 to -10 dBHL. However, when the rate hits past 4000 Hz, the hearing ability decreases to -36 dBHL. On the other hand, the right ear, the hearing ability increases gradually except when the frequency reaches 250-500 Hz where the hearing ability remains constant. However, this shows the right ear has a better listening ability. For the second patient, the hearing ability varies between different frequencies. In the left ear, the hearing ability increases between 250-2000 Hz. However, when the frequency goes past 2000 Hz, the hearing ability starts to decrease. This illustrates that when sound frequency goes beyond 2000 Hz, the hearing ability of the left ear becomes null. However, for the left ear, the hearing ability increases. The majority of thresholds are roughly 0 dB HL for a healthy ear. Points under 0 dB HL on the scale designate