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June 2023 | Issue 26

One NASED certified tech adjusts the internal components of audiology equipment while another observes

Lee Searcy and Joshua Rives are e3 MSR West Colorado NASED-certified technicians providing service for audiology instruments. (Photo courtesy e3 MSR West Colorado)

Calibrating equipment is key

The truth is, we cannot be confident that our newborn hearing screening results are accurate if we are not confident that our equipment is functioning properly. Calibration refers to the process of making sure that the sounds that you are presenting using your newborn hearing screening equipment are accurate.


Calibrating equipment is key

Calibration frequency

Contingency plan for equipment failure

COEHDI support contact update

There are two types of calibration: subjective and objective. 

  1. Subjective calibration is the process of looking for signs of wear or damage of your equipment and conducting listening checks (also referred to as biological checks) where you use your newborn hearing screening equipment to perform a screening on yourself. 
  2. Objective calibration is the process of using specialized tools and specialized tests to assess the function of your newborn hearing screening equipment and ensure that the sounds you are presenting are accurate. 

In this issue, we walk you through the two types of calibration and provide information and resources to help ensure your equipment is functioning properly.

How often should my newborn hearing screening equipment be calibrated?

Ideally, subjective calibration should occur at the start of each day before you begin screening a baby. It should also occur several times during days when the equipment is used for more than 20 screenings. And, subjective calibration should be the first troubleshooting step if your newborn hearing screening equipment is accidentally dropped or anytime you notice unexpected results. A good example of “unexpected results” is if you, or someone on your team, notices an unexpected increase in the number of babies who refer or do not pass their screen. 

Objective calibration should be performed at least once per year by a certified technician. Most newborn hearing screening programs will contract with a third party for this service. It is important to find a technician who has received specific training calibrating and repairing your make/model of equipment. A technician certified by the National Association of Special Equipment Distributors (NASED) ensures calibration and service of your equipment is high quality.

Contact information for the Colorado branch of the most common nationwide provider of audiology equipment sales and service solutions is:  

e3 MSR West Colorado

14377 Mead St

Longmont, CO 80504

Office: (800) 777-4130

Fax: (303) 604-2610


Biomedical equipment technicians, commonly referred to as BioMeds, are hospital employees responsible for installation, maintenance, and repair of biomedical hospital equipment. BioMeds are not NASED certified technicians and cannot perform objective calibration of your newborn hearing screening equipment. If your newborn hearing screening equipment is broken or you suspect it is not functioning properly, BioMeds may be able to reach out to the manufacturer of your equipment for technician support or to order replacement equipment or loaner equipment from the manufacturer. Notably, they are not trained to provide objective annual calibration of your newborn hearing screening equipment. 

Contingency plan for equipment failure

Creating a written protocol or standard operating procedures (SOP) for newborn hearing screening at your facility is highly recommended to ensure consistency and a high standard of care. As part of this written protocol, we recommend making a contingency plan for equipment failure. This plan should spell out the course of action that should be taken in the event that your newborn hearing screening equipment malfunctions. 

Example contingency plan for equipment failure

  1. Contact BioMed (if it is hospital policy) to evaluate the equipment failure. BioMeds are responsible for installation, maintenance, and repair of biomedical hospital equipment.
  2. Contact the manufacturer of the equipment (if under warranty) or a third party service such as e3 MSR West Colorado (800-777-4130) to arrange for service/repair of the equipment, loaner equipment, or new equipment. 
  3. Babies who miss screening due to equipment malfunction should be brought back for screening when the equipment is repaired, or they should be scheduled by the hospital for screening elsewhere. All screening should be completed before one month of age.

Questions About Newborn Hearing Screening? Contact Audiology Support at COEHDI!

Hannah Glick is an audiologist with COEHDI who can answer any newborn hearing screening related questions that you have. Please note that Hannah’s email address has been recently updated, but her phone number remains the same. 

headshot of a smiling young woman with shoulder length brown hair standing outdoors with yellow fall leaves in the background foliage

Hannah Glick, AuD, PhD, CCC-A

EHDI Consultant

[email protected] *updated 6/2023*



For technical questions about hearing screening, please contact:

Hannah Glick, AuD, PhD, CCC-A

EHDI Consultant

[email protected]


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