Frank Wartinger, Au.D. (Course Director #496199) leads engaging CAOHC-approved certification courses for occupational health professionals who administer audiometric testing as required by OSHA, MSHA, DOD and FRA regulations. Over the last decade we have hosted 170+ courses and trained 2,000+ students from all 50 US states and 12 countries.

Click here to see what students are saying about the course!

Unique Team-Teaching Approach Earmark's CAOHC courses feature multiple engaging expert instructors, which includes CAOHC Course Directors, Doctors of Audiology, Occupational Health Nurses, and CAOHC Council Members. You can get to know each instructor through the links below:

Interactive Technology The course features advanced virtual audiometric training with simulated patients. This is made possible through a software platform developed by Earmark Hearing Conservation, which has since set the industry standard in virtual hearing training.

All inclusive Course Tuition Transparent pricing includes the exam fee and access to all available official CAOHC course materials, including the new CAOHC official online Exam Prep software.

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Michelle May 22, 2026

Frank is an amazing instructor - thank you for keeping things light and moving. We covered A LOT of information in 8 hours. Hannah was also wonderful. I usually have a very hard time focusing during online courses, but this held my attention. Appreciate all you do!

Course: CAOHC Recertification Course
Julie Sep 10, 2025

I have never done a live synchronous virtual ALL DAY group course before but found this to be so enjoyable. Thank you all for making this a great learning experience. The pre-exam practice was extremely helpful to be prepared for the exam format. The manual audiometer simulator was also a great learning tool. Thank you!

Course: CAOHC Recertification Course / Co-Sponsored by Johns Hopkins University
Nicole Aug 12, 2025

All instructors were easy to follow and very informative. It was evident that they truly enjoy teaching this course and want to help each person understand the importance of protecting hearing and preventing hearing loss. This class was enjoyable while educational and I will definitely want to return for my recertification.

Course: CAOHC Certification Course / Co-Sponsored by Johns Hopkins University
Michael Jul 19, 2025

I’ve had the privilege of working in the fire service for over 30 years, earning around 10 certifications along the way. The instructors in this course stood out as exceptionally polite, reassuring, and informative - truly the best I’ve encountered. The virtual format was seamless and effective. I couldn’t find any areas for improvement - the course was outstanding just the way it was!

Course: CAOHC Certification Course / Co-Sponsored by Johns Hopkins University
Jason Jul 9, 2026

The last time I did my COHC recertification, it was in the live format so I wasn’t sure how the virtual version would go this time around. I was very happy with my experience and would highly recommend these instructors. Both were engaging, knowledgeable, kept the class paced appropriately, and had unique ways for us to complete the practicum portion of the recertification.

Course: CAOHC Recertification Course
Tina Jun 17, 2026

Instructor spoke very clear and was knowledgeable in all material. For a person very challenged with computers, this course had a lot of obstacles, but everyone was able to overcome each one.

Course: CAOHC Recertification Course
Kenneth Apr 14, 2026

All the instructors were fantastic and made the 20hrs of mandatory lecture enjoyable

Course: CAOHC Certification Course
Lisa Jan 15, 2026

This class was EXCELLENT! I have had the recertification class several times, but I’d say this was the best one. having the instructors tag-team helped break up the day. They were very organized, gave examples of practical real-life scenarios, and answered all the questions that were asked. You can tell that they enjoy teaching and they are good at it. I will recommend this class to anyone else that I can. Thank you for having the online version available.

Course: CAOHC Recertification Course
Jennifer Dec 12, 2025

I have completed several live virtual online courses (8) in the past couple of years and this was definitely in my top 2. The instructors were experts in the subject matter and facilitated a relaxed learning environment. The course was engaging with a variety of leaning methods. I found the exam prep to be very helpful, and allowed be to identify areas where I needed more review. I would definitely recommend this course to others.

Course: CAOHC Certification Course
Jessalyn Oct 31, 2025

I have taken A LOT of virtual courses/trainings in my time as an ER nurse, but this was by far one of the best I’ve taken! Both instructors were extremely knowledgeable and engaging. I hate taking courses where you can tell the instructor is just reading off the slides. This was far from that. All the little tips and tricks were so helpful in understanding the material. It was truly an enjoyable week of learning! Thanks so much for a great course!

Course: CAOHC Certification Course
Stephanie Oct 31, 2025

This course was great! The information was presented in a very clear, easy to understand manner. The instructors were down to earth and very open to questions/feedback and were very engaging. They made the course material more enjoyable and dedicated the time to help prep for the exam. Highly recommend!!

Course: CAOHC Certification Course
Shane Jun 17, 2026

I was very impressed with the Instructors knowledge and presentation of materials. It was made to be entertaining and enjoyable.

Course: CAOHC Recertification Course
Karen May 22, 2026

It was a great course. Frank really keeps your attention well. I learned a lot and enjoyed the course.

Course: CAOHC Recertification Course
Irene Apr 14, 2026

Amazing wealth of knowledge. Excellent program and they made all of us, participants feel relaxed during the stressful moments of the practicum and written test. Thank you to Frank Wartinger, Hannah and Juan Vasquez! All very professionals with good sense of humor. I will see you again in 5 years!!! Irene Pirog

Course: CAOHC Recertification Course - Co-presented with Rutgers School of Public Health
Lauren Mar 31, 2026

I thoroughly enjoyed the CAOHC Certification Course. I was the trainer for my company, and I have attended several of virtual trainings. Earmark was by far the absolute best virtual training I’ve attended, and I dare say one of the best trainings virtual, or not! Your instructions were clear, your study and class materials were incredibly helpful and the content was very interesting. I knew exactly what to expect the whole time. I was really blown away by how wonderful this program was, and how much I loved the content. A training program is only as good as the instructors though so I do want to give you all the kudos you deserve. Hannah did an amazing job keeping us all engaged and breaking down some of the more difficult topics into bite sized pieces that we could more easily comprehend and digest. She was incredibly thoughtful when answering questions and overall very pleasant to learn from. I liked how Hannah was able to tell stories that applied to the topics in a relevant, engaging way that helped give some real-world examples of what we may encounter instead of leaving it all on the slides. She was also just really fun to have leading class! Juan was also very engaging, while we had less interaction with Juan during our class time his contribution was impactful. I really liked his analogies and the variety of experience he brought to the table. Juan had a very pleasant demeanor and a way of explaining some of the tougher concepts in an easy to understand way. Frank was very engaging and made the class very comfortable, and laid out very clear instructions for each step along the way. I feel like you’re pretty set with who you are at this point, but please never change your dad jokes! It kept class fun and exciting. Your knowledge shone through and I am always impressed with people who can weave jokes into training but not loose the importance of the material. Your analogies and real-world stories were very helpful especially when it came to retaining the information. One thing I loved about class was that we had three instructors because it kept things fresh and easier to maintain attention. I know you said you appreciate constrictive feedback because it helps you improve, but honestly I have nothing but 5 stars for this team. Thank you so much for your time. Your passion for the subject and the topics you taught really shone through. - Lauren Cavalieri

Course: CAOHC Certification Course
Boris Mar 5, 2026

Great review course. Knowledgeable and passionate presenters. Very thoughtful and thorough approach to teaching, helps to retain information and pass the exam. Strongly recommend

Course: CAOHC Recertification Course
Frances Nov 3, 2025

Frank and Juan were great. Their silly little memory aides were awesome as that is exactly how I remember things too. They made this course educational and fun. I would choose them again for my recertification in 5 years.

Course: CAOHC Certification Course
Barbara Sep 11, 2025

Really enjoyed the class and the jokes. Will definitely recertify with Frank.

Course: CAOHC Recertification Course / Co-Sponsored by Johns Hopkins University
Leon Sep 3, 2025

The course was excellent and so were the course materials and the presenters. I highly recommend it!

Course: CAOHC Recertification Course / Co-Sponsored by Johns Hopkins University
Ritesh Jul 20, 2025

Had fun in the class, both Frank and Juan were very helpful, answered all questions and a great curriculum.

Course: CAOHC Certification Course / Co-Sponsored by Johns Hopkins University
Rebekah May 29, 2026

Honestly, this was a great course! Everyone was so involved; it was very easy to grasp the concepts and keeping it lighthearted and fun made it so much easier to sit through. The ONLY thing I wish I could have done differently is to have the option to review my exam at the end - I really wanted to know what I didn’t answer correctly. That is quite literally the only piece of feedback I have. Outside of that, I’ll be looking for this group in 5 years! :)

Course: CAOHC Certification Course
Eric May 29, 2026

Great course, knowledge packed!
Keep the dad jokes coming, they made the class feel light and time flew by!
Thank you

Course: CAOHC Certification Course
Christine May 22, 2026

a lot of information presented in a great interactive format.

Course: CAOHC Recertification Course
Tammy Apr 10, 2026

I really enjoyed taking this class. The information was well presented and I felt well prepared for the exam. The presenters were very knowledgeable.

Course: CAOHC Certification Course
Tiffany Apr 9, 2026

Thank you for keeping what could be a very boring and dull 3 days, interesting and lively! Love the different instructors and input/advice/ stories. The review was greatly helpful. Very clear outline of what was to be expected!

Course: CAOHC Certification Course
Scott Mar 14, 2026

I really enjoyed this course. The instructors were all great and very passionate about hearing. The test prep material was a huge help.

Course: CAOHC Certification Course - Co-presented with Rutgers School of Public Health
Tressa Mar 5, 2026

Very interesting, not boring!

Course: CAOHC Recertification Course
Alicia Mar 4, 2026

The training was relevant and comprehensive.
Facilitators were subject matter experts and professional. I thoroughly enjoyed this program and feel adequately prepared.

Course: CAOHC Recertification Course
Kathryn Feb 19, 2026

Great course, very informative.

Course: CAOHC Certification Course / Co-Sponsored by Johns Hopkins University
Tiffani Dec 15, 2025

This class was very good and gave a lot of valuable information.

Course: CAOHC Certification Course
Adisha Dec 13, 2025

Very informative and great lecturers. Time management use was effective in carrying out the bulk of work.

Course: CAOHC Certification Course
Javier Sep 12, 2025

Amazing teachers, the information was clear and easy to understand.

Course: CAOHC Recertification Course / Co-Sponsored by Johns Hopkins University
Brian Sep 5, 2025

Excellent content and presenter; I highly recommend the course.

Course: CAOHC Certification Course / Co-sponsored by Rutgers University
Saliha Apr 29, 2026

It was very intense course, lots of information. The instructors did very well to keep us engaged with hands on activities and some jokes :)
The only recommendation I can make 24 h is not enough for this intensive course. Thanks

Course: CAOHC Certification Course