Virtual CAOHC Courses offered by Earmark Hearing Conservation are entirely online with no in-person requirements. Instruction, audiometric practicum, hearing protection device practicum, and examination are all completed through your browser. Please reach out with any questions regarding our virtual courses.

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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
Tammy Apr 14, 2025

Wonderful, very informative course. The instructors have a wealth of knowledge and great personalities. I have already recommended these course instructors to my co-workers. I definitely plan to re-certify with them as well.

Course: CAOHC Certification Course - Co-Sponsored by Johns Hopkins University
Clare Apr 11, 2025

The course instructors made learning very easy and the course materials were very precise especially the audiometry simulator.

Course: CAOHC Certification Course - Co-Sponsored by Johns Hopkins University
Lauren Mar 13, 2025

Exceptional virtual course - mostly because of the presenters (Frank and Juan). and their jokes are funny. Perfect pace, content, reassuring mannerisms. Videos , pictures, tables, etc were above and beyond helpful.

Course: CAOHC Recertification Course - Co-Sponsored by Johns Hopkins University
Ty Feb 24, 2025

very well presented course, very professional yet casual atmosphere

Course: CAOHC Certification Course
Kevin Feb 21, 2025

To Frank, Juan, Hannah and Mindy you guys were awesome. Classes were always on time, lecturers ensured students understood the material. I would definitely recommend this course to my peers.

Course: CAOHC Certification Course
Phillip Feb 13, 2025

Amazing course with excellent delivery for a virtual class. I enjoyed the course and the various stories from those in the class.

Course: CAOHC Recertification Course
Martin Nov 8, 2024

Very thoroughly taught. Loved the interaction and discussions between classmates and instructors. Audiometer simulator is amazing and great practice.

Course: CAOHC Certification Course - Co-Hosted with JHU
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
Jeremy Mar 14, 2025

Juan and Frank did a great job. The have the technical expertise and experience to teach the curriculum and answer all of the student’s questions.

Course: CAOHC Recertification Course - Co-Sponsored by Johns Hopkins University
Margaret Mar 8, 2025

The instructors were amazing, and the course was very interactive and engaging. I felt well-prepared for the certification exam. Highly recommend earmark!

Course: CAOHC Certification Course
Mark Feb 21, 2025

Great content and teaching technique would recommend this course to anyone who is needing it.

Course: CAOHC Certification Course
Stuart Feb 20, 2025

Excellent recertification class, all the information needed for recert without unnecessary fluff. Good use of time for each section of study.

Course: CAOHC Recertification Course
Diane Jan 23, 2025

Well planned and presented by clearly knowledgeable staff covering a very technical topic

Course: CAOHC Certification Course
Nicole Jan 20, 2025

Great presenters and I loved the interactive portion. I felt very well prepared and confident going into the test. Thank you!!

Course: CAOHC Certification Course
Linda Jan 10, 2025

Having done the refresher course previously in-person, I was a bit concerned about the course being virtual. I thought maybe it would be more difficult to stay focused and didn’t think the practicum segments would be as comprehensive. However, Juan, Frank and Hanna did such a wonderful job of presenting the material that I was actually more focused than I’ve been in previous in-person courses! Even though other students were in the class, being on camera for the course gave more of a 1:1 feeling vs. being in a physical classroom with other students. The practicum segments were just as (if not more) educational and helpful as my previous courses as well. Thanks for making my (probable last - hope to be retired within 5 years :-) ) re-cert course a great one!!

Course: CAOHC Recertification Course
Amber Dec 12, 2024

I thought the course was great. There was a lot of information to cover but Frank kept it “light” with his humor.

Course: CAOHC Recertification Course - Co-Hosted By JHU
Cristina Dec 6, 2024

Great course. Very engaging!

Course: CAOHC Certification Course - cohosted by Rutgers School of Public Health
Jessica Nov 8, 2024

The instructors were all amazing!! They taught very well.

Course: CAOHC Certification Course - Co-Hosted with JHU
Jennifer Oct 28, 2024

Highly intelligent and engaging professionals leading the course. Break out sessions were a nice change of pace in a virtual setting. Virtual audiometer program was a reasonable approximation for real world, manual audiometer operations. A smart combination of professionalism and family friendly hearing related “dad jokes” really broke up the content and made harder to digest materials easier to remember. Lastly, no timeline given for Juan’s audio book career launch. Please place us on the email list for that. Thank you. Will be returning to this company for the renewal courses.

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
Ann Apr 8, 2025

Instructors were very knowledgeable and open to conversation.

Course: CAOHC Recertification Course - Co-Sponsored by Johns Hopkins University
Heather Mar 13, 2025

Great course with instructors who made the topic interesting and kept our attention.

Course: CAOHC Recertification Course - Co-Sponsored by Johns Hopkins University
tracey Jan 10, 2025

This was my first online class and it went very well. All three presenters were excellent.

Course: CAOHC Recertification Course
Daniel Dec 6, 2024

Great course. Better than expected. I learned a lot.

Course: CAOHC Certification Course - cohosted by Rutgers School of Public Health
Jennifer Jan 30, 2025

Confusing and difficult material was presented simply and easily to understand. It was not presented too far over my head. Multiple instructors were used. Received well rounded information from different people.

Course: CAOHC Certification Course