CAOHC Certification & More with e3 Occupational Health


When conducting hearing or spirometry testing within your occupational health and safety program, it is crucial to stay current on certifications and training.

e3 Diagnostics Occupational Health Solutions and our partners offer over 70 NIOSH and Council for Accreditation in Occupational Hearing Conservation (CAOHC) certification and re-certification courses year-round. These courses are held in various locations, making them convenient and affordable for you and your staff to attend.


Although not mandated, OSHA strongly advises that individuals conducting hearing tests within a hearing conservation program (HCP) obtain certification from the CAOHC.

Our comprehensive 3-day course is designed to meet the stringent requirements of the CAOHC. Successful completion of this course makes participants eligible for CAOHC certification, as a Certified Occupational Hearing Conservationist (COHC).

Our courses are led by CAOHC-approved course directors who bring a wealth of expertise from various fields. These professionals are credentialed or licensed in areas such as audiology, industrial hygiene, occupational health nursing, otolaryngology, occupational medicine, noise-control engineering, and safety. Their diverse backgrounds and deep understanding of hearing loss prevention provide a rich and engaging learning experience.

Course Schedule:

  • Duration: 3 days
  • Time: 8:00 am to 5:00 am first two days, 8:00 am to noon third day

Register Now

Your certification remains valid even if you switch positions. Re-certification is required every five years to uphold updated knowledge and skills. e3 Diagnostics Occupational Health Solutions provides an 8-hour re-certification course for this purpose.

While audiometric testing programs require supervision by a physician or audiologist, a COHC is directly engaged with workers who experience noise exposure. COHCs usually conduct pure tone air conduction audiometric testing, fit hearing protection, offer education, and ensure compliance with HCP requirements.

Hearing protection

A CHOCs responsibilities include educating and training employees on the proper use of hearing protection.


Certified Occupational Hearing Conservationists (COHC), also known as industrial audiometric technicians, can, with some supervision:

  • Conduct baseline, annual, and hearing retest
  • Perform visual inspections of the ear
  • Take detailed hearing health histories
  • Screen audiograms for issues and refer to audiologists or physicians as needed
  • Maintain and calibrate audiometric equipment
  • Keep accurate and up-to-date records
  • Inform employees about changes in hearing referred to as Standard Threshold Shift (STS)
  • Educate and train employees on the purpose of audiometric testing, the effects of noise exposure on hearing, and proper use of hearing protection

To become a COHC, you need to complete a CAOHC approved, 20-hour certification course, and pass the accompanying exam. This computer-based exam is available in English and Spanish.
Our training courses meet the requirements of CAOHC. Upon successful completion of the course participants are eligible for certification through CAOHC.

According to, the average hourly pay for a COHC in the United States is $26.77 with hourly wages ranging from $14.42 to $34.86.

Adult man testing breathing function by spirometry having health problem. Diagnosis of respiratory function in pulmonary disease.

OSHA requires individuals conducting spirometry testing to complete an approved training course by NIOSH, based on the workplace or employee exposure. Healthcare professionals are also recommended to take NIOSH-approved training for accurate spirometry results.

Our two-day (16 hours, 8:00am – 5:00pm) course includes the most recent nationally-recognized standards (ATS/ERS) for reliable spirometry in the occupational health setting. The class combines lecture, demonstration, and practice using a wide variety of spirometers in a relaxed classroom environment. Upon successful completion, participants will be awarded a certificate valid for 5 years.

Who Should Attend

  • Nurses
  • Medical Assistants/Technicians
  • Other medical personnel
  • Safety Personnel
  • Anyone involved in spirometry testing

Register Now

Staying current with certifications for hearing and spirometry testing is crucial. Our year-round NIOSH and CAOHC courses make it easy and affordable to keep your team compliant and skilled.


Other Good Reads: Implementing Hearing Conservation in the Workplace

Follow us on Social!

fb_blue_30x30    linkedin_blue_30x30    youtube-logo

If you haven't already, make sure to subscribe to our newsletter to keep up-to-date with our latest resources and product information.