- The Short Answer: CD Means Course Director
- Who Issues the Credential and What It Authorizes
- Why the Acronym Causes Confusion
- What a Course Director Actually Does
- The Five Workshop Topic Areas
- What It Takes to Qualify
- How the Exam Works
- Fees and Cost Mechanics
- Validity and Renewal
- Where the Credential Fits in a Career
- Where to Go From Here
- Frequently Asked Questions
- Here, CD means Course Director, the CAOHC-approved instructor qualification for teaching occupational hearing conservation courses.
- The exam is online, open-book, with saved progress and a ten-day completion window; the passing score is 80%.
- You get two attempts in the window; failing both means repeating the eight-hour workshop and the exam.
- Eligibility requires 1,000 relevant hours within five years across at least three specified activities.
The Short Answer: CD Means Course Director
On this site, CD stands for Course Director. It refers to the instructor qualification issued through the Council for Accreditation in Occupational Hearing Conservation (CAOHC), the body behind the occupational hearing conservation (OHC) training pathway. The official program name is Course Director (CD), and you will also see it described as a CAOHC-approved Course Director.
If you landed here looking for something else that shares those two letters, this page is not about that. Everything below concerns the person who directs and teaches CAOHC-approved hearing conservation courses. For a quick-reference version of the definition, see our companion pages on what CD stands for and CD meaning.
Who Issues the Credential and What It Authorizes
CAOHC is the issuing organization. The Course Director credential sits on the instructor side of the CAOHC ecosystem: while hearing conservationists complete an OHC course to earn their own certification, the Course Director is the person qualified to lead those courses. That distinction matters for study planning, because the Course Director exam is about running and teaching courses, not about performing the day-to-day technician tasks the students learn.
The qualification is documented against a published policy manual, last revised in November 2025. Because policy details can change between revisions, always confirm current requirements directly with the issuer before you commit time and money. Our overview of what CD certification is covers the credential at a higher level.
Why the Acronym Causes Confusion
Several unrelated credentials and terms abbreviate to the same two letters. That overlap is the reason a clear definition page exists. A few practical rules keep you from mixing things up:
- Check the issuing body. For this credential it is CAOHC, and the subject area is occupational hearing conservation.
- Check the audience. A Course Director qualification is for instructors who direct OHC courses, not for students taking one.
- Do not transfer facts from other credentials. Fees, passing scores, renewal cycles and eligibility rules are specific to each issuer, and nothing here should be assumed to apply elsewhere.
If you are comparing this role with the student-side OHC certificate, treat them as two separate credentials with separate exams and separate renewals. Our pages on what CD is and what a CD is walk through that relationship further.
What a Course Director Actually Does
A Course Director is accountable for the integrity of an approved hearing conservation course from start to finish. In practice that spans several responsibilities:
Before the course
Preparing the curriculum, confirming it aligns with the current CAOHC framework, arranging materials and resources, and handling the administrative steps that must be completed before students arrive.
During the course
Delivering instruction, managing the practicum components, supervising adjunct faculty and practicum assistants, and ensuring the course is conducted as approved.
After the course
Completing required follow-up procedures and documentation, and maintaining the records the issuer expects from an approved course.
That lifecycle view is exactly why the second exam domain, Course Director procedures before, during and after OHC courses, deserves serious attention from candidates.
The Five Workshop Topic Areas
The CD workshop curriculum is organized into five published topic areas. Treat these as preparation topics drawn from the issuer's course description, not as an official weighted or exhaustive exam blueprint. No verified weighting has been published, so allocate your study time based on your own experience gaps. A deeper walkthrough lives in our complete guide to the five CD content areas.
Domain 1: Developing OHC certification and recertification course curricula
Candidates should understand how an OHC course is built and how recertification courses differ from initial certification courses.
- Structuring course content to meet CAOHC expectations
- Distinguishing initial certification curricula from recertification curricula
- Aligning learning objectives with the practical skills students must demonstrate
Domain 2: Course Director procedures before, during and after OHC courses
This area is operational: what the director must do at each stage of a course.
- Pre-course preparation and approvals
- In-course supervision of instruction and practicum activities
- Post-course documentation and follow-up obligations
Domain 3: Effective teaching techniques and hearing-conservation training resources
Teaching skill is a core part of the role, not an afterthought.
- Instructional methods suited to adult and workplace learners
- Selecting and using hearing-conservation training resources effectively
- Adapting delivery for in-person and hybrid course formats
Domain 4: Federal regulatory changes affecting OHC courses
Course content must stay current with the regulatory environment that shapes hearing conservation programs.
- Tracking federal changes that alter what courses must cover
- Updating course materials when regulations shift
- Explaining regulatory context accurately to students
Domain 5: Scientific and technical advances in hearing-conservation instruction
Hearing conservation is a technical field, and instruction must reflect current knowledge.
- Incorporating new scientific and technical developments into teaching
- Evaluating whether new methods or technology belong in a course
- Keeping instruction accurate as the field evolves
What It Takes to Qualify
Eligibility is front-loaded. You must have your documentation approved before ordinary registration, so the paperwork is effectively the first gate. The published requirements include:
- A qualifying current professional license or certification. Current web eligibility includes physician assistants, while the November 2025 manual list differs, so confirm your own status with CAOHC before relying on either list.
- 1,000 relevant hours within five years, spread across at least three specified activities.
- A complete supervised OHC course taken in person or hybrid, completed as adjunct faculty or a practicum assistant.
- Credential documentation plus supervisor and Course Director verification letters, approved before ordinary registration.
Our dedicated CD requirements guide breaks down how to document each item.
Key Takeaway
Start the verification letters early. They depend on other people's schedules, and approval must come before you can register, so they are the most common source of avoidable delay.
How the Exam Works
The Course Director exam is delivered online through the CAOHC Learning Center. It is open-book, with saved progress and a ten-day completion window. It is not a long continuous sitting, so there is no single marathon session to prepare stamina for.
| Feature | What the issuer publishes |
|---|---|
| Delivery | Online through the CAOHC Learning Center |
| Format | Open-book, progress saved |
| Completion window | Ten days |
| 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 |
Because the exam is open-book, the challenge is not memorizing isolated facts. It is knowing where to find the answer quickly and applying course-director judgment to scenarios. Details such as calculator policy, adaptive testing and any remote-proctoring rules specific to this exam are unverified, so check the current candidate instructions. For difficulty context, see how hard the CD exam is, and for scoring detail, our guide to the CD passing score.
Honest note on the numbers: no pass rate is publicly disclosed, so any figure you see quoted elsewhere deserves skepticism. Our write-up on the CD pass rate explains what can and cannot be said.
Fees and Cost Mechanics
The published fee structure separates the exam from the workshop, which is why totals depend on your route. The member versus non-member distinction is not published.
| Item | Amount (USD) |
|---|---|
| Initial exam | $200 |
| Renewal exam | $150 |
| Virtual workshop (October 16, 2026 session), charged separately | $500 |
| Initial route total (workshop plus initial exam), by calculation | $700 |
| Workshop-plus-renewal total, by calculation | $650 |
| Eligible exam-only renewal | $150 |
The totals above are simple sums of the published components. See the full CD certification cost breakdown for budgeting advice, and the CD exam dates page for scheduling details.
Validity and Renewal
The credential is valid for five years. Renewal can follow two paths: complete the workshop plus the exam, or use the eligible exam-only route. The exam-only route requires at least two of the following four items:
- Ten qualifying OHC courses directed
- Two years of CAOHC committee or task-force service
- Ten relevant continuing education contact hours
- One approved Course Director workshop taught
Note that ten CE hours is one option among four, not a universal standalone renewal quota. Extensions of up to six months are discretionary, and the request must be made at least 30 days before expiration. Failed exams do not qualify for an extension. Renewing a separate COHC credential is a different process and does not renew your Course Director status.
Where the Credential Fits in a Career
Course Directors typically work in or alongside occupational health and safety settings where hearing conservation training is delivered: audiology and hearing health practices, occupational medicine and nursing, industrial hygiene and safety consulting, and organizations that run CAOHC-approved training programs. Because eligibility starts with an existing professional license or certification, the Course Director credential generally adds an instructor-level capability to an established career rather than starting a new one.
Pay varies widely by employer, region and the mix of teaching and clinical or safety work, and no single figure can be responsibly quoted. For a qualitative discussion, see our CD salary guide, our look at CD jobs, and our analysis of whether the certification is worth it.
Where to Go From Here
If the definition now makes sense and you are considering the credential, the most useful next moves are practical:
- Verify your eligibility against the current CAOHC policy manual, and confirm any profession-specific questions directly with the issuer.
- Read our CD study guide and the one-page CD cheat sheet for a structured review.
- Explore the broader CD training options and the CD certification overview.
- Test your recall with scenario-style questions on our CD practice test platform. Practice-question allocations there are editorial and not an official blueprint.
Operations first
- Work through Domain 2, since procedures before, during and after a course are the most concrete material
- Gather eligibility paperwork and request verification letters
Build and teach
- Cover Domain 1 curriculum development and Domain 3 teaching techniques together, since they reinforce each other
Stay current
- Review Domains 4 and 5, which depend on regulatory and scientific updates, using current sources rather than old notes
Frequently Asked Questions
CD means Course Director, the CAOHC-approved instructor qualification for directing and teaching occupational hearing conservation courses. It refers only to this credential, not to any other qualification that shares the abbreviation.
Yes. It is an online, open-book exam delivered through the CAOHC Learning Center, with saved progress and a ten-day completion window. The passing score is 80%, and you have two attempts within the window.
If both attempts within the window are unsuccessful, you must repeat the eight-hour Course Director workshop and the exam. Failed exams also do not qualify you for a renewal extension.
Five years. You can renew by completing the workshop plus the exam, or through an eligible exam-only route that requires at least two of four specified activities, such as directing ten qualifying courses.
The initial exam is $200, and the separately charged virtual workshop on October 16, 2026 is $500, for a calculated $700 initial total. Renewal exams are $150, and an eligible exam-only renewal is also $150.