Audiometers are devices used in measuring the sensitivity of an individual's hearing. They are invaluable during the evaluation of hearing loss and are common features at most audiology centers and ENT clinics. audiometers can be used with people of all ages and are often used to detect early stages of hearing loss in head injuries, ear infections, acoustic trauma, and people with ruptured ear drum.
Before an audiometer is used, the physician will conduct simple preliminary test to determine whether an audiogram is required. This typically involves checking the patient's ability to hear spoken words or whispers with either ear blocked. Depending on the results of the test, a tuning fork may also be held a small distance off the side of each ear to test the patient's hearing sensitivity.
Working with audiometers allows doctors to more accurately measure the sensitivity of a patient's hearing. There are different types of audiometers found today. They range from large advanced units found in clinics, to portable audiometers that can be used within the home. Some audiometers can be used to measure specific features, such as the tone or intensity of a sound, while others can be applied to a wider range of tests.
Most audiometers are typically accompanied with a set of headphones connected to the main unit. audiometers might also be accompanied with bone vibrators, which allow doctors to test a patient's conductive hearing level.
audiometers can record the intensity of the sound being played. Sound intensity is measured in decibels. People who can hear sound intensity below 25 decibels (dB) are considered normal. In comparison, the intensity of loud music-such as the sound played during a concert-is measured at 80 to 120 decibels, while a whisper is measured at 20 decibels. Sounds in excess of 85 decibels are considered to be unhealthy and can sometimes lead to hearing loss. Larger intensity sounds in excess of a 120 dB, such as the sound of a jet engine, can cause hearing loss or prolonged pain.
audiometers can also be used to measure the tone or frequency of the sound vibration (Hz). Even though human hearing range is between 20 Hz and 20,000 Hz, actual speech only occurs between 500 and 3000 Hz. People who can hear tones from 250 Hz to 8,000 Hz are considered to have normal hearing. An audiometer test is generally painless, and can be completed within 15 to 60 minutes, depending on how elaborate the test is.
For accurate results, audiometers need to be calibrated regularly. This ensures that the resultant readings are in line with the stimulus that the patient is being exposed to. audiometers can be calibrated in several different ways, depending on the model and type. Most units can be measured using an audiometric calibration system (also known as an Ear Simulator system).
It is vital that you buy your audiometers from reliable sources. Medical Device Depot is widely respected for the high quality of our medical equipment. Our representatives are always on hand to help you with making the best possible purchase.