- What CAT Means on This Site
- Who Issues the Credential and What It Covers
- The CETa Prerequisite: Not a Stand-Alone Credential
- Exam Format, Fee, and Passing Requirement
- The Eight Competency Categories
- Registration and Test-Day Mechanics
- Keeping the Certification Active
- Where the Credential Is Used
- A Domain-Based Study Sequence
- Frequently Asked Questions
- CAT here means Commercial Audio Technician, an ETA International journeyman-level certification for commercial and institutional sound systems.
- The exam has 100 questions, a two-hour limit, a $80 USD fee, and a 75% passing requirement.
- CAT is not stand-alone: you must hold the Associate Certified Electronics Technician (CETa) certification first.
- Eight competency categories span acoustics, microphones, speakers, measurements, wiring, 70-volt systems, troubleshooting, and safety/codes.
What CAT Means on This Site
The acronym "CAT" is shared by several unrelated credentials, which is why searches for its meaning return a confusing mix of results. On this site, CAT stands for Commercial Audio Technician. It is a specialty certification offered through ETA International and aimed at technicians who design, install, and troubleshoot speech and music sound systems in commercial and institutional settings.
Think of the spaces where sound has to work every day without drama: houses of worship, school auditoriums, conference rooms, hotel ballrooms, retail floors, restaurants, and public-address installations. The Commercial Audio Technician credential is built around the practical competencies needed in those environments. If you want a quick orientation to related phrasing, our pages on what CAT stands for and what CAT certification is cover the same ground from slightly different angles.
Who Issues the Credential and What It Covers
The governing body is ETA International, which publishes a competency document describing what the Commercial Audio Technician examination expects candidates to know. That document, titled Commercial Audio Technician - CAT: Categories Listing and Competencies Requirements, is a 14-page PDF that carries a 2013 copyright. ETA classifies CAT at the Journeyman level.
The scope is deliberately practical. The credential addresses the design, installation, and troubleshooting of speech and music sound systems in commercial and institutional environments. That wording matters: it is not a studio-engineering credential, a live-touring front-of-house credential, or a broadcast certification. It sits in the world of installed sound, where reliability, intelligibility, correct wiring, and code compliance count for more than creative mixing.
One note on the source date: the 2013 copyright on the competency document is simply the document's own marking. It should not be read as proof of a particular revision or a change to the examination in any given year, and ETA does not publish a percentage allocation for the categories. For a deeper look at how the content areas are organized, see our complete guide to all eight CAT content areas.
The CETa Prerequisite: Not a Stand-Alone Credential
The single most important structural fact about CAT is that it is not a stand-alone certification. The CAT-specific competency document states that Associate Certified Electronics Technician (CETa) certification must be acquired first. In other words, CAT is an add-on specialty that builds on a foundation of general electronics knowledge.
This has practical consequences for planning:
- Sequence: If you do not already hold CETa, it comes first on your timeline, not alongside the audio material.
- Budget: The $80 examination fee for CAT does not include the separate CETa prerequisite, so your total outlay is larger than the CAT price alone.
- Knowledge base: Because CETa covers electronics fundamentals, the CAT exam can assume you already understand basics and focus on audio-specific application.
Our CAT requirements guide walks through eligibility and prerequisites in more detail, and the CAT certification cost breakdown helps you account for every line item, not just the exam fee.
Exam Format, Fee, and Passing Requirement
ETA International publishes the core exam parameters on its Specialty Certifications page. Here they are in one place:
| Feature | Commercial Audio Technician (CAT) |
|---|---|
| Governing body | ETA International |
| Level classification | Journeyman |
| Number of questions | 100 |
| Time allowed | 2 hours |
| Passing requirement | 75% |
| Exam fee | $80 USD |
| Hands-on assessment | None required |
| Certification term | 4 years |
| Retake | One free retake within one year of the first exam session |
A 75% requirement on 100 questions means you need 75 correct answers. Two hours for 100 questions averages out to about 72 seconds per question, which is generous for recall items but tighter for anything involving a calculation or a multi-step wiring scenario. Because there is no hands-on component, the entire assessment is knowledge-based; the exam tests whether you can reason through audio problems on paper rather than demonstrate soldering or rigging in person.
Wondering how demanding this is in practice? Our CAT exam difficulty guide and pass rate discussion address that question honestly, including what is and is not publicly known.
The Eight Competency Categories
The competency document organizes the examination preparation material into eight major categories. ETA does not publish a percentage weighting for them, so no single category should be assumed to be the largest, and none should be assumed to be equal. The practical implication: prepare for all eight and do not skip a category because it feels peripheral.
Domain 1: Acoustics
The behavior of sound in rooms is the foundation of every installed system. Candidates should understand how space shapes what listeners hear.
- How sound travels, reflects, absorbs, and diffracts in commercial spaces
- Reverberation and its effect on speech intelligibility
- Why room geometry and surface materials influence loudspeaker placement
Domain 2: Microphones
Capturing speech and music cleanly is the first link in the chain.
- Common transducer types and polar patterns
- Choosing and positioning microphones for podiums, conference tables, and ensembles
- Feedback risks and how mic technique and placement reduce them
Domain 3: Speakers
Loudspeakers turn the electrical signal back into sound, and the exam expects practical selection and deployment knowledge.
- Driver types, enclosures, and coverage patterns
- Impedance and power handling as they relate to amplifier pairing
- Ceiling, wall, and distributed loudspeaker layouts
Domain 4: Sound & Measurements
Audio work relies on numbers: levels, ratios, and units that let you describe and verify performance.
- Decibel concepts and level relationships
- Interpreting measurements to verify a system is performing as designed
- The relationship between gain, loss, and signal-to-noise considerations
Domain 5: Wiring
Wiring is where many installed systems succeed or fail.
- Balanced versus unbalanced connections and why it matters over long runs
- Cable types, connectors, and proper termination practice
- Grounding and routing to limit noise and interference
Domain 6: 70-Volt Systems
Constant-voltage distribution is a signature topic of commercial audio, used where many loudspeakers share long cable runs.
- Why higher-voltage distribution allows long runs and many speakers on one line
- Transformer taps and how they set each speaker's power draw
- Totaling speaker loads against amplifier capacity
Domain 7: Troubleshooting
The exam rewards systematic thinking about faults.
- Isolating problems by working through the signal path in order
- Recognizing the symptoms of hum, distortion, dropouts, and feedback
- Choosing sensible test steps before swapping parts
Domain 8: Safety, Codes and Standards
Installed systems live inside buildings, so electrical safety and code awareness are part of the job.
- Safe work practices around electrical equipment
- Code and standards considerations for commercial installations
- Responsible installation habits that protect people and property
For a category-by-category breakdown with more depth, see the CAT exam domains guide, and keep the CAT cheat sheet handy for last-week review of the formulas and facts you most need to recall quickly.
Registration and Test-Day Mechanics
Examinations are proctored through an ETA Certification Administrator. According to ETA's FAQ, testing is delivered either on the Trapeza online testing platform or on paper and pencil. The standard Trapeza route requires an onsite administrator, so in most cases you will be testing at a location run by an approved administrator rather than at home.
ETA also offers a distinct remote-proctoring route through ExamRoom.AI. That is a separate option from the standard onsite Trapeza process, so confirm with ETA or your administrator which route is available to you and what its specific setup rules are before test day.
What to bring and what to expect
- Photo identification is required.
- Scratch paper and a nonprogrammable scientific calculator are permitted under ETA's general examination rules. Used scratch paper is surrendered afterward.
- There is no hands-on portion, so you will not need tools or equipment.
The calculator permission is worth noting because several of the categories, especially Sound & Measurements and 70-Volt Systems, lend themselves to arithmetic. Practice with a nonprogrammable scientific model so that your test-day calculator feels familiar. Scheduling specifics are covered in our CAT exam dates and scheduling guide.
Keeping the Certification Active
A CAT certification has a four-year term, and keeping it current follows ETA's general Maintenance track (not the Maintenance with Hands-On track). The requirements break down like this:
- Submit the maintenance form.
- Complete 10 continuing-education hours per year, totaling 40 over four years, or provide qualifying supervisor-completed employer verification.
- Pay $25 per year, totaling $100 over the four-year cycle.
Key Takeaway
Budget for the long run, not only the exam. Beyond the $80 test fee and the separate CETa prerequisite, the maintenance cycle adds $100 across four years, plus whatever you spend on continuing-education hours if you are not covered by employer verification.
Whether those ongoing costs are worth it depends on your career path. Our ROI analysis of the CAT certification weighs that question, and the CAT salary guide discusses earnings in qualitative terms rather than guessing at figures.
Where the Credential Is Used
Because the exam is framed around commercial and institutional environments, the natural employers are organizations that install, service, or operate sound systems in those settings. Typical examples include:
- Audio-visual and sound contractors that design and install distributed paging, conferencing, and background-music systems
- Facilities and maintenance departments at schools, universities, hospitals, and corporate campuses
- Houses of worship and venues that rely on technicians to keep speech reinforcement dependable
- Electronics service firms that already employ CETa-certified staff and want specialty credentials for audio work
Specific job titles and hiring requirements vary by employer, and a certification alone does not guarantee a position. If you are exploring roles, our CAT jobs overview and CAT training page are good next stops.
A Domain-Based Study Sequence
Rather than a generic schedule, order your preparation so that each category supports the next. Acoustics and measurements give you the vocabulary; wiring and 70-volt systems give you the calculations; troubleshooting and safety tie everything together. Here is one sensible eight-week arrangement, assuming CETa is already in hand:
Foundations: Acoustics and Sound & Measurements
- Learn decibel relationships and room behavior first, since every later topic references them
- Practice level calculations with a nonprogrammable scientific calculator
Signal Chain: Microphones and Speakers
- Compare mic types and polar patterns against realistic room scenarios
- Work through impedance, power handling, and coverage questions for loudspeakers
Distribution: Wiring and 70-Volt Systems
- Drill balanced connections, termination, and grounding
- Do repeated speaker-load and transformer-tap totaling problems until they feel routine
Application: Troubleshooting and Safety, Codes and Standards
- Trace faults logically along the signal path in practice scenarios
- Run full 100-question timed sets and revisit any weak category
For a broader plan, our CAT study guide expands on pacing and review, and you can test yourself against exam-style questions in our CAT practice tests. Timed, full-length practice on the main practice site is the best way to confirm you can hit 75 correct answers within the two-hour limit.
Frequently Asked Questions
CAT means Commercial Audio Technician, a specialty certification from ETA International covering the design, installation, and troubleshooting of speech and music sound systems in commercial and institutional environments. It is unrelated to other credentials that share the same abbreviation.
Yes. The CAT competency document states that CAT is not a stand-alone credential and that Associate Certified Electronics Technician (CETa) certification must be acquired first. The CETa cost is separate from the $80 CAT exam fee.
The exam contains 100 questions with a two-hour limit, and you need 75% to pass. There is no hands-on assessment, so the evaluation is entirely knowledge-based.
ETA offers one free retake within one year of your first examination session. Because it is a single attempt with a deadline, plan your review carefully before using it.
The term is four years. Maintenance involves submitting the maintenance form, completing 10 continuing-education hours per year (40 total) or obtaining qualifying supervisor-completed employer verification, and paying $25 per year, which totals $100 over the cycle.