What is pure tone audiometry?
Audiometry of pure tone is a hearing test. It is used to determine whether a person suffers from hearing loss and can provide results for each individual ear. The test usually using a pair of headphones or headphones that are inserted in the ear, both block any ambient sound in the room, the test determines the ability of the individual to hear the signal as it passes through the air of the inner, outer and middle ear, as well as through the skull bones.
subjects that are unable to wear headphones such as small children can also be tested in a soundproof room with speakers instead of ear buds. Tests of pure tone audiometry are usually given an audiologist with a reference from an otolaryngologist, a doctor who specializes in the ear, head, neck, nose and neck. There are two parts that are tested, which usually lasts only 20-25 minutes. The first part includes the subject listened to by various playgrounds and frequencies to determine what the ear is capable of hearing. The second part includes the use of headphones to test bone lines andAir and results from this part of the test will help determine where the problem lies when found.
The results of the pure tone test of audiometry are brought into a graph called Audiogram. One side of the graph represents a frequency or pitch and the other represents intensity or decibels (DB). The signs on the chart show the softest sound that the person heard at every frequency. The most common tested frequencies are 250, 500, 1000, 2000, 4000 and 8000 Hertz (Hz), each in the range of 0 to 120 dB.
test results provide threshold values of pure tone (PTT) of an individual who represents the softest tones that one hears at least half of the time. The test results are considered normal, if the number of 0-25 dB is, the slight loss of hearing at 26-40 dB, slight at 41-55 dB, mild to heavy at 56-70 dB and heavy at 71-90 dB. Hearing loss is considered serious if the number is more than 90 dB, and at this stage withE begins to influence speech and language. The test determines the softest sound for each frequency, so that the person can only hear low or high -frequency sounds and not only diagnose overall hearing problems.
The pure tone of the audiometry can diagnose a number of problems. Hearing loss related to age, also known as presbycusis, can affect elderly with elderly and significant influence on their ability to hear higher frequency and spoken word. Otitis media is usually observed in young children and occurs when the fluid begins to build in the middle ear. With a sufficient number of diagnosis, measures can be taken to prevent further hearing loss. Audiometry of pure tone can also diagnose hearing loss related to noise, to which it can occur at any age and is most commonly seen in individuals who are repeatedly exposed to noise, such as working around a loud machine without proper ear protection.