- What You Are Actually Studying For
- Eligibility Comes Before the Exam
- Exam Format, Window and Passing Rules
- The Five Curriculum Areas, Mastered One by One
- Getting Full Value From the Eight-Hour Workshop
- Taking an Open-Book Exam Without Getting Burned
- Fees and Budget Mechanics
- A Domain-Sequenced Study Schedule
- After You Pass: Validity and Renewal
- Frequently Asked Questions
- The CD is the CAOHC Course Director credential for instructors of occupational hearing conservation courses, not a general-audience certification.
- The exam is online, open-book, requires 80% to pass, and gives you two attempts within a ten-day window.
- Failing both attempts means repeating the CD workshop and the exam, so treat your first attempt seriously.
- Eligibility approval, including 1,000 relevant hours and a supervised OHC course, must be complete before ordinary registration.
What You Are Actually Studying For
The Course Director credential comes from the Council for Accreditation in Occupational Hearing Conservation (CAOHC). It qualifies experienced hearing-conservation professionals to direct and teach CAOHC-approved occupational hearing conservation (OHC) courses. That makes this exam different from the usual professional certification test. You are not proving that you can perform audiometry in the field; you are proving that you can run, teach and administer the courses that train others to do so.
That distinction shapes everything about how you should prepare. A candidate who studies as though the exam covered the content of the OHC student course will miss the point. Your exam centers on directing a course: building curricula, handling procedures around the course, teaching well, tracking regulatory change, and keeping up with the science. If you want the broader picture of the credential first, start with our overview of what CD certification is and the CD meaning explainer.
Eligibility Comes Before the Exam
You cannot simply buy an exam seat and start cramming. CAOHC requires a documented eligibility package to be approved before ordinary registration opens. For most candidates, the paperwork is the first real hurdle, and it takes calendar time, so begin it before you open a single study resource.
What CAOHC Expects You to Document
- A qualifying current professional license or certification. Credential documentation is part of your submission.
- 1,000 relevant hours within five years, spread across at least three specified activities.
- A complete supervised OHC course, in person or hybrid, completed as adjunct faculty or a practicum assistant.
- Verification letters from your supervisor and from a Course Director, approved before you register.
One wrinkle deserves attention: the current CAOHC web eligibility language includes physician assistants, while the November 2025 policy manual lists qualifying professions differently. If your profession sits near that boundary, do not assume. Confirm approval directly with CAOHC before investing in the workshop. Our CD requirements guide walks through the qualification path in more detail.
Exam Format, Window and Passing Rules
The Course Director exam is delivered online through the CAOHC Learning Center. It is open-book, and your progress saves as you work, so this is not a single sit-down, locked-room marathon. You have a ten-day window to complete it. It is not an eight-hour or multi-day continuous exam, and it is worth stating that plainly because the eight-hour figure elsewhere in this guide refers to the workshop, not the test.
| Feature | What CAOHC Publishes |
|---|---|
| Delivery | Online through the CAOHC Learning Center |
| Open-book | Yes |
| Completion window | Ten days, with saved progress |
| Passing score | 80% |
| Attempts | Two within the window |
| If both attempts fail | Repeat the workshop and the exam |
| Question count and item types | Not publicly verified |
| Pass rate | Not publicly disclosed |
Notice what is missing: CAOHC does not publish a verified question count, the split between scored and unscored items, the exact item types, or a pass rate. Be skeptical of any source that quotes a precise pass percentage. Our CD pass rate analysis explains what can and cannot be said responsibly, and the passing score guide covers the 80% threshold in depth.
Key Takeaway
Two attempts sounds generous, but the penalty for using both is steep: a repeat of the workshop plus the exam. Plan to pass the first time, and treat the second attempt as insurance rather than strategy.
The Five Curriculum Areas, Mastered One by One
CAOHC publishes five Course Director workshop curriculum areas. These are issuer-course preparation topics, not an official weighted or exhaustive exam blueprint, so no one can honestly tell you that Domain 3 is worth a fixed percentage of your score. The sound approach is even coverage with extra time where your own experience is thinnest. For a deeper treatment of each area, see the complete CD exam domains guide.
Domain 1: Developing OHC Certification and Recertification Course Curricula
You must understand how an OHC course is built so that it satisfies CAOHC requirements, both for initial certification courses and for recertification courses.
- Know the difference in purpose and structure between certification and recertification courses.
- Practice mapping learning objectives to course content and time allocation.
- Be ready to evaluate whether a proposed curriculum meets CAOHC-approved course standards.
Domain 2: Course Director Procedures Before, During and After OHC Courses
This area covers the administrative and operational responsibilities that surround every course you direct.
- Organize your knowledge by timeline: preparation, delivery, and follow-up.
- Know what documentation a Course Director is accountable for and when it is due.
- Review the November 2025 policy manual closely; procedural questions are most likely to track its wording.
Domain 3: Effective Teaching Techniques and Hearing-Conservation Training Resources
Directing a course means teaching it well. Expect the exam to probe instructional judgment, not just recall.
- Review adult-learning principles as they apply to technical, regulation-heavy content.
- Know which training resources support hands-on skills and which support knowledge retention.
- Think through how you would adapt delivery for mixed audiences and in-person versus hybrid formats.
Domain 4: Federal Regulatory Changes Affecting OHC Courses
Regulatory awareness is a recurring responsibility for anyone who instructs hearing-conservation professionals.
- Understand how federal occupational noise requirements influence what OHC courses must teach.
- Track how regulatory changes should flow into curriculum updates.
- Verify details against current official sources rather than memory or old course notes.
Domain 5: Scientific and Technical Advances in Hearing-Conservation Instruction
The field evolves, and a Course Director is expected to keep instruction current.
- Stay familiar with developments in hearing protection, measurement and audiometric practice.
- Be able to explain how new science changes what and how you teach.
- Practice distinguishing established practice from emerging technique.
Our CD cheat sheet condenses these five areas into a one-page review you can use for last-day refreshers.
Getting Full Value From the Eight-Hour Workshop
The CD workshop is eight hours of training, and it is the single richest source of exam-relevant content. The next scheduled virtual workshop is October 16, 2026. Because it is virtual, you can take disciplined notes organized directly by the five curriculum areas above, which turns the session into a ready-made study outline.
- Create five note pages before the session starts, one per domain, and file each point under the right heading as the instructor covers it.
- Flag anything the instructor repeats or stresses. Repetition during a workshop is a strong signal of what matters.
- Capture the policy manual references the instructor mentions so you can find the exact language later during the open-book exam.
- Ask questions in the moment about areas of the manual that seem ambiguous, especially regarding eligibility and procedures.
For more on the training side of the credential, see our page on CD training.
Taking an Open-Book Exam Without Getting Burned
An open-book format lulls candidates into under-preparing. Because you have a ten-day window and saved progress, the real constraint is not recall; it is how quickly and accurately you can locate and apply the right guidance. With a pass line of 80%, a handful of misread questions can cost you the attempt.
Build Your Reference Kit in Advance
- Keep the November 2025 policy manual open and tabbed or bookmarked by topic.
- Assemble your own workshop notes, organized by domain.
- Bookmark the CAOHC course description page and any regulatory sources you rely on.
Work the Exam Deliberately
- Read each question fully before searching; open-book errors usually come from answering the question you expected rather than the one asked.
- Use the saved-progress feature to step away rather than rushing when fatigued.
- Do not burn through your first attempt as a trial run. A failed first attempt leaves exactly one more chance.
Fees and Budget Mechanics
Costs are published in US dollars and are easy to total, but the pieces are billed separately. The exam fee and the workshop fee are distinct line items.
| Path | Components | Total |
|---|---|---|
| Initial certification | $200 exam + $500 workshop | $700 |
| Workshop-plus-renewal | $150 renewal exam + $500 workshop | $650 |
| Eligible exam-only renewal | $150 renewal exam | $150 |
The totals above are calculated sums of the published fees. CAOHC does not publish a member versus non-member distinction for these amounts. For the full picture, including what to budget beyond the sticker prices, see the CD certification cost breakdown, and for the return side of the equation, whether the CD is worth it.
A Domain-Sequenced Study Schedule
This is the one place for scheduling advice, and it is tied to CD specifics: the workshop supplies the framework, and the open-book exam rewards fast navigation of the policy manual. So sequence your study to follow how a course actually unfolds, then finish with mixed practice. Adjust the weeks to fit your workshop date and exam window.
Policy Manual and Domain 2
- Read the November 2025 policy manual end to end and tab it by topic.
- Outline Course Director procedures before, during and after a course.
- Confirm your eligibility package status with CAOHC.
Domain 1 and Domain 3
- Study certification versus recertification curriculum requirements.
- Review teaching techniques and training resources for technical content.
- Attend or complete the eight-hour workshop and sort notes by domain.
Domains 4 and 5
- Verify current federal regulatory points against official sources.
- Review recent technical and scientific developments in hearing conservation.
- Connect each change to how it would alter course content.
Mixed Practice and Exam Readiness
- Take mixed-domain practice sets and note which manual sections you consult most.
- Re-tab the manual around your weak spots.
- Choose a ten-day window when work and family obligations are lightest.
If you are working backward from a target date, our guide to CD exam dates and scheduling helps you plan around registration and the completion window.
After You Pass: Validity and Renewal
The Course Director credential is valid for five years. Plan for renewal early, because the routes have specific requirements and a lapse is far easier to prevent than to repair.
Two Renewal Routes
- Workshop plus exam: complete a CD workshop and pass the renewal exam.
- Eligible exam-only route: take the renewal exam alone, but only if you meet at least two of these four criteria: ten qualifying OHC courses directed, two years of service on a CAOHC committee or task force, ten relevant CE contact hours, or one approved CD workshop taught.
Note that ten CE hours is one option among the four criteria, not a universal standalone renewal requirement. Extensions of up to six months are discretionary; you must request one at least 30 days before expiration, and a failed exam does not qualify. Renewal of the COHC credential is a separate matter from CD renewal.
If you are weighing the career side, our CD salary guide and CD jobs overview explain where the credential tends to matter, mainly with organizations that train and certify hearing-conservation personnel.
Frequently Asked Questions
Yes. It is delivered online through the CAOHC Learning Center, progress is saved, and you have a ten-day window to complete it. Open-book does not mean easy: the pass line is 80%, so navigating the policy manual quickly and accurately still requires preparation.
You get two attempts within the window. If both fail, you must repeat the CD workshop and the exam, which means paying the workshop fee again in addition to the exam fee.
CAOHC does not publicly verify the question count, item types or a weighted blueprint. The five curriculum areas are unweighted workshop topics, so prepare evenly rather than trusting any source that claims exact domain percentages.
The initial exam is $200 and the virtual workshop is a separate $500, totaling $700. A renewal exam is $150, so workshop-plus-renewal totals $650, and an eligible exam-only renewal is $150.
No. Your eligibility package, including the qualifying license, 1,000 relevant hours, a supervised OHC course, and verification letters, must be approved before ordinary registration. Review the CD requirements and start the paperwork early.
Combine eligibility planning, workshop notes organized by the five curriculum areas, and plenty of practice navigating the policy manual, and you will walk into your exam window prepared to pass on the first attempt. For a refresher on where this fits in the bigger picture, revisit our CD certification overview and the original CD study guide.