What Are The Types of Audiometry?
There are two types of audiometry - tympanometry and objective audiometry. Objective audiometry uses acoustic recordings, while subjective audiometry relies on a subject's subjective responses. The former relies on the frequency response of the ear and acoustic reflex measurements, while the latter focuses on electrophysiologic measurements. Subjective audiometry uses the subject's response to sounds and is not as accurate as objective audiometry. The first type of audiometry tests the ability to detect and repeat words. This test involves headphones. Then, the audiologist will play a series of sounds through headphones. Then, the patient will be asked to repeat back the words or press a button when the audiologist instructs them to do so. Once the patient has responded correctly, the results are recorded and charted on an audiogram. The second type of audiometry tests the ability to hear the softest audible sounds. A healthy human ear can hear whispers at 20 dB. Jet engines reach 180 dB. In contrast, the softest tones, those at about fifty to sixty decibels, are detected with detailed audiometry. If a patient cannot hear any sounds below 25 dB, the loss of hearing is indicative of some degree of loss in hearing. The type and severity of hearing loss can provide clues about the cause of the hearing problem as well as the likelihood of recovery. Audiometry tests assess the hearing in the outer, middle, and inner ear. These tests are designed to detect sensorineural hearing loss, which results from damage to the cochlea and nerve, as well as conductive hearing loss, which is caused by damage to the eardrum and ossicle bones. Different types of audiometry include the aforementioned tests, as well as other specialized diagnostic procedures. Pure tone audiometry, on the other hand, measures the frequency sensitivity of a person's hearing. The frequency of pure-tone tones is tested, and the threshold indicates the softest sound that is audible 50% of the time. Pure-tone audiometry is performed with the aid of an audiometer, which is specifically designed to conduct audiometric hearing diagnoses. The pure-tone audiometric test is an objective measure of hearing loss and pinpoints disturbances by using acoustic stimulation in both ears. Speech tests, also called speech threshold tests, are performed to assess a person's ability to hear speech. A speech reception threshold is the lowest decibel level at which a patient can hear 50% of the words on a test, which should be within the acoustic threshold of 500, 1000, and 2000 Hz. Pure tone audiometry charts the sound levels of various tone frequencies in both ears. The results indicate the level of hearing at which a person is most comfortable.