Machines that are used to evaluate hearing loss are known as audiometers. These devices are considered standard in most audiology offices or ENT facilities. Usually the include some embedded hardware unit that connects to a pair of headphones and a test button that is controlled via a computer.

The systems may also be used with bone vibrators as a way to test conductive hearing devices. There are both software and hardware audiometers available, both come in many configurations. The meters that connect through standard PCs can be run by anyone at their home to test hearing although the accuracy of the device is not high because of a lack of standard for calibration.

Clinical PC-based meters are usually more efficient and accurate with their results. They do tend to be more expensive than most software models. Typically these are used in audiology centers, research facilities and hospitals, where accuracy is a high priority.

When audiometers are used to test the hearing of an individual, they must be correctly calibrated. This is necessary to ensure that the level on the display is the same as the stimulus that the test subject is receiving. The right calibration guarantees measurements that are consistent no matter where they were taken. Likewise, having accurate and reliable results is important when it comes to quantifying and identifying hearing loss. Ear Simulator Systems or Audiometric Calibration Systems are typically used to calibrate these machines.

Audiometry, the term taken from Latin words meaning to hear and to measure, is the science of measuring the hearing ability. Mostly the field focuses on measuring ability to hear at certain levels, but this science also tracks the ability one has to decipher between various sound intensities, identify pitch, or distinguish speech from background noise. Otoacoustic emissions and acoustic reflex are also measurable through these devices. The measuring units can help doctors diagnose diseases of the ear in addition to hearing loss.

Meters can be purchased through offline and online retailers. The prices for the devices will vary based on the type. Models that give accurate results or have more complex functions tend to be more expensive and for that reason are used in professional facilities. There are also models that are designed for use in home settings.

Hearing loss may be brought on by a host of factors. It is considered the total or partial inability for one to hear. The loss is marked by a lowered sensitivity to sound that is usually heard. The severity of the issue is categorized by the volume increase necessary for one to detect sound.

Audiometers are devices used in the science of audiometry. These devices, available in numerous models, are used to measure hearing loss. The more complex and accurate of these devices are often used in health care facilities to ensure the best results. There are also units available for at-home use, although these may not offer the same level of accuracy. Calibration of the device plays a major part in the results of the test. Hearing loss can be brought on by many factors and may be temporary or permanent, partial or total.