How Often Do Audiometers Need to Be Calibrated?

Having your audiology equipment calibrated on a yearly basis is one of the most important steps to take in maintaining accurate test results. This is called a Biological Calibration and it ensures that any resulting output complies with strict values set by the American National Standards Institute or manufacturer’s specific references for hearing thresholds.


A yearly calibration is an important part of the maintenance of audiology equipment. It ensures that test results will be valid and accurate, and will comply with strict industry standards and manufacturer’s specifications. In fact, in many countries, calibration of hearing care equipment is required by law. This ensures that patients are given the correct results based on the highest quality signal possible, and protects them from false positive and negative tests.

Getting your audiometer calibrated yearly may seem like an inconvenient task, but it’s one that is absolutely necessary and crucial to the accuracy of your hearing evaluations. Calibrations are typically performed by a qualified technician who will check the sound level meter (SLM) and its ear simulator. They will then compare the SLM’s output against the standardized signal produced by the ear simulator. In the end, they will determine whether the sound pressure levels are within acceptable limits.

In addition to calibrating the sound level meter and ear simulator, the SLM must also be evaluated to make sure that it produces a high-quality output for high-frequency measurements. This process is known as frequency response correction (FRC). It is a critical component of audiometry, as it ensures that the test stimuli are presented at correct levels.

As the use of hearing equipment increases, it is more important than ever to have your instruments professionally calibrated and maintained. Proper equipment calibration will help you provide exceptional customer service and reduce the risk of false diagnoses. Incorrect measurements can have legal and financial ramifications for clinics.

An annual calibration is a good time to evaluate all of the accessories on your hearing testing system, such as cables, jacks, and transducers. These items can have a significant impact on the results of your audiograms, so it’s important to keep them clean and in good condition. You should also inspect the ear cushions for signs of wear and tear. You can prevent damage to ear cushions by regularly cleaning them with alcohol-free wipes. If you notice any signs of wear, it’s recommended that you replace them.

Every other year

Audiometers are highly precise electronic instruments used to test a person’s hearing. Their use is regulated by strict industry standards and their manufactures’ specific guidelines. As a result, these pieces of equipment must be checked and verified on a regular basis to ensure that they are functioning properly. This routine check, known as a biological calibration, is critical to ensure that the device is free from any defects that could erroneously impact test results.

In order to perform a biological calibration, you must first make sure that the audiometer is functional by testing it with a known, stable threshold using either a human subject or an artificial one. You should also test the output of the device for distortion or static by listening to it. If you find any problems with your audiometer, such as a tone that sounds distorted or static, you must calibrate it immediately before a patient uses it.

Then, you must determine if the audiometer is still within tolerance by comparing its output to a reference standard. To do this, you should measure the noise output of your audiometer with a sound level meter and an octave-band filter set. If you’re unsure of how to do this, consult your CAOHC course director or professional supervisor.

Finally, you should calibrate the audiometer by measuring its sensitivity against a reference standard, such as an artificial mastoid or a human subject with normal hearing. This is a complex process, and you may want to ask for help from an experienced technician.

Calibration is a crucial part of the healthcare profession, and it’s a requirement for any professional who works with audiometric equipment. This is especially true for audiologists, as their work can be presented in court as evidence. To keep their patients safe and protect themselves, audiologists should have all of their equipment tested and calibrated regularly. The best way to do this is to hire a company that provides both biological and objective calibrations. e3 Diagnostics can provide a wide range of services for all types of equipment, including audiometers. Contact us today for more information.

Every three years

Audiometers generate very precise results and they must be calibrated on a regular basis to ensure that their output complies with the strict specifications set by the American National Standards Institute (ANSI) and International Electrotechnical Commission (IEC) product manufacturing standards for pure tone hearing tests. Depending on the type of calibration, this process can be conducted by a highly trained professional or by a technician certified by NASED.

A variety of factors can affect the accuracy of audiometers, such as daily wear and tear, the age of the equipment, and its exposure to extreme temperatures. Because of this, annual calibration is required by the Occupational Safety and Health Administration (OSHA) and many governing bodies.

An acoustic calibration is a more in-depth functional check of an audiometer and can detect any deviations from the specified limits set by ANSI. This method involves measuring ambient noise levels in the test room to determine whether the test environment is suitable for testing and examining various transducer outputs to see if the test stimuli are being presented at the correct level.

The calibration process involves the use of a coupler, or artificial ear, and a sound level meter. The ear simulator emits a tone that is reflected by the surface of the ear and detected by a sensor under a rubber dome on the artificial ear. This signal is then passed to the sound level meter to produce an output reading.

There is a significant dependence of the measured values in audiometer calibration on temperature changes, especially in the high frequencies. This dependency is caused by the fact that the frequency response of the ear simulator depends on the thermal properties of the material it is made of, which can be influenced by the variation in temperature.

It is recommended that a mechanical function test be performed before every clinical session with an audiometer to verify the proper functioning of the machine. The function test should include a comparison of the mechanical functions of the audiometer with those listed in the hearing screening manual. It is also important to note any observations or findings of the function test, such as the tone sounding out of tune or a lack of response when the tone lever/button is pressed.

Every five years

Keeping your audiometers well-calibrated ensures that you can provide accurate hearing tests for your patients. This will help reduce risks and improve patient care. Regular calibration can also help you meet compliance standards and reduce downtime in your clinics. This maintenance will save you time and money in the long run. It will also improve the overall quality of your results. This will help you make sound medical decisions for your patients.

There are a number of things that can cause an audiometer to become uncalibrated. This includes age of the device, frequency of use, and exposure to extreme temperatures. In addition, improper handling or storage can cause the device to malfunction. It is important to calibrate your equipment regularly to prevent errors and ensure that you are using the most up-to-date calibration files.

Audiometer calibration involves an in-site test that uses circumaural ErPhs and covers the EHF range. It is crucial to perform this calibration in an isolated booth test room so that ambient noise does not influence the results. In addition, the calibration process should be performed by a qualified technician in accordance with IEC60645-1. This will help you achieve accurate results that are consistent across different laboratories.

A calibration report can help you determine the accuracy of your hearing instrument and how it is performing. This report will provide you with information about the performance of your device and will identify any problems that may require immediate attention. It will also provide you with a list of steps to correct any issues that occur.

In addition to calibration, it is important to keep your audiometers clean and maintained. This will prevent the build-up of dust and debris inside the headsets and earpieces. You should also inspect the ear cushions regularly for signs of damage or wear. These may affect the fit of the earphone couplers and can lead to inaccurate readings. In addition, it is important to keep the cord integrity intact to avoid a loss of signal.

It is recommended that your hearing screening equipment is calibrated annually to verify the accuracy of its measurements. This will ensure that your devices comply with strict industry standards and manufacturer’s specific references for hearing thresholds. You should also keep a record of the date of each calibration.