Factors influencing the validity of audiometry Copy
Factors influencing the validity of audiometry
It is essential that accurate, reliable, and valid results are obtained to avoid unnecessary expenses and loss of productivity. Some of the factors that may contribute to inaccurate and invalid results include:
The test must be conducted by a competent person The earphone placement is specific. If the earphones are incorrectly placed with the wrong earphone on the wrong ear the results will not be accurate. The red earphone must be placed on the right ear and the blue earphone on the left ear The earphones are calibrated to a specific machine; therefore, the technician must ensure that the correct earphone set is used with the correct audiometer The stimulus must be presented in descending order while the frequency remains the same. Each frequency is tested completely before moving on to the next frequency The stimulus must be presented at irregular intervals to prevent the worker from anticipating the stimulus Avoid presenting the stimulus where the worker can see the presentation on the stimulus as this will give the worker cues to respond Avoid any distractions such as moving around within view of the worker The technician must become familiar with the specific audiometer in use Accurate instructions must be given to the worker prior to testing. The technician must ensure that the worker understands the instructions and is consistent with the instructions given The ambient noise levels must not exceed 45dB in the testing room; however, it is preferable to use a booth The equipment must be calibrated according to the legal requirements and must be checked daily prior to use Various physiological aspects can influence the reliability of the test. These may include a temporary threshold shift, the general health of the worker and symptoms such as tinnitus
Psychological factors
The motivation and attitude of the worker can affect the test results. If the worker feels threatened by the possible results, he/she may respond erratically resulting in a nil/void result. The purpose of the test must be explained including the hearing conservation programme and the benefits of the test Lack of concentration can result in delays and inaccurate test results. The technician should observe the worker throughout the test to ensure attention Ensure thorough instructions to all workers to avoid the worker assuming that they are familiar with the test procedure when in fact they are not Language barriers may also result in invalid test results
Figure 8.6: A. A screening audiogram on Mr C. – original4
In audiogram Figure 8.6A above a false low-frequency hearing loss in both ears is evident because of excessive background noise in the test area. When the worker is retested in a quiet area that the hearing levels are within normal limits see Figure 8.6B4.
In-person Training
Specifically for bookings for a group of minimum 10 learners
The training program includes a pre-learning phase that allows participants to familiarize themselves with foundational concepts before engaging in in-person interactions with the facilitator.
Following the pre-learning phase, participants will have the opportunity to meet with the facilitator in a physical classroom setting. This direct interaction is crucial for addressing any questions or concerns that may have arisen during the self-study period.
Additionally, the physical classroom component is designed to facilitate hands-on practical training. This aspect of the program allows participants to apply theoretical knowledge in real-world scenarios, enhancing their understanding and retention of the material. Working under the guidance of an experienced facilitator, learners can practice skills, collaborate with peers, and gain valuable insights that are difficult to achieve through online learning alone.
Overall, this structured approach—combining pre-learning with direct facilitator contact and practical classroom experiences—ensures a comprehensive and effective learning journey that accommodates various learning styles and maximizes participant engagement.
Blended Learning
Self-pased learning combined with weekly online contact sessions with a facilitator and in-person practical training days
This combination allows learners to work through the theory at their own pace while still interacting with instructors on a weekly basis through regular question and answer online contact sessions.
The online part is flexible, letting learners study whenever it works best for them.
Live sessions help build a sense of community and support.
The in-person classes are important for hands-on learning, giving learners the chance to practice their skills with guidance from experienced mentors.
This well-rounded approach improves learning by meeting different learning styles and preferences.
WhatsApp us
Login
Accessing this course requires a login. Please enter your credentials below!
We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it.Ok