What Is A CAT?

What a CAT Actually Is

On this site, CAT stands for Commercial Audio Technician. It is a specialty certification for people who design, install and troubleshoot speech and music sound systems in commercial and institutional environments. Think of the paging and background music in a retail store, the distributed audio in a school, the sound reinforcement in a house of worship, or the ceiling-speaker network in an office or hospital.

The credential is about practical system competence rather than recording-studio artistry or live-concert mixing. A CAT candidate is expected to understand how sound behaves in a room, how microphones and loudspeakers are chosen and placed, how signal and power are carried across cable runs, and how to find a fault when a zone goes silent. If you want a quick orientation on naming, the related explainers What Does CAT Stand For? and CAT Meaning cover the terminology, while this article focuses on what the certification contains and how it works.

Who Issues It and Where It Sits

The Commercial Audio Technician certification is governed by ETA International, an electronics certification organization. ETA classifies CAT as a Journeyman level credential within its specialty certifications. That classification matters for expectations: it signals working technician competence in a defined specialty rather than entry-level awareness or senior-level design authority.

The scope of the exam is published in ETA's CAT-specific competency document, Commercial Audio Technician - CAT: Categories Listing and Competencies Requirements. The version currently linked is a 14-page document bearing a 2013 copyright. Treat that date as a property of the document, not as a statement about how recently the exam was revised. The competency document lists the categories and the knowledge candidates are expected to demonstrate, and it is the best primary source for what is fair game on the test.

The CETa Prerequisite

This is the single most important structural fact about the credential. According to the CAT competency document, CAT is not a stand-alone certification. You must acquire Associate Certified Electronics Technician (CETa) certification first. The CETa covers foundational electronics knowledge, and CAT then layers audio-specific competence on top of it.

Practically, this changes how you plan. If you do not yet hold CETa, your first project is that credential, not the audio exam. It also changes the budget: the $80 CAT examination fee does not include the cost of the CETa prerequisite, any study materials, or the later maintenance expenses. For the full picture of eligibility and sequencing, see CAT Requirements: Eligibility, Prerequisites & How to Qualify, and for a line-by-line money view, see CAT Certification Cost: Complete Pricing Breakdown.

Exam Format at a Glance

The exam is a knowledge test. It does not include a hands-on practical component, so you are not asked to terminate a connector or patch a rack in front of an evaluator. You are asked to demonstrate understanding through questions.

Doing the arithmetic helps you plan pacing: 75 correct answers out of 100 is the threshold, and two hours across 100 questions averages out to roughly a minute and a bit per question. That leaves room to flag harder items and return to them. For detail on the score itself, read CAT Passing Score: Exactly What You Need to Pass, and for a realistic sense of effort, How Hard Is the CAT Exam?

The Eight Competency Domains

ETA's competency document organizes the exam content into eight major categories. These are the exact domain names, and they are listed without any official weighting, so treat them as a checklist of knowledge areas rather than a ranked priority list.

A deeper domain-by-domain walkthrough lives in CAT Exam Domains: Complete Guide to All 8 Content Areas. The key insight for most candidates is how the domains connect: acoustics informs microphone and speaker choices, speaker impedance drives the 70-volt calculations, wiring quality affects measurement results, and troubleshooting draws on everything else.

Why 70-Volt Systems Deserves Extra Attention

Many candidates come to commercial audio from a general electronics or home-audio background where constant-voltage distribution is unfamiliar. In an installed commercial environment, though, it is routine. Expect to be comfortable reasoning about transformer taps, total connected wattage versus amplifier output, and why this approach suits many loudspeakers spread across a building. If this is your weakest area, give it dedicated, calculation-heavy practice rather than passive reading.

Registration and Test-Day Mechanics

Testing is proctored through an ETA Certification Administrator. The standard routes are Trapeza online testing or paper-and-pencil. The standard Trapeza route requires an onsite administrator. ETA also offers a distinct remote-proctoring route through ExamRoom.AI, which is a separate option rather than the default.

On the day, plan for the following:

• Photo identification is required.
• Scratch paper and a nonprogrammable scientific calculator are permitted under ETA's general examination rules, and used scratch paper is surrendered afterward.
• The fee is $80 USD for the CAT examination itself.

Because scheduling depends on your administrator and the testing route you choose, check current options directly rather than assuming a fixed calendar. Our CAT Exam Dates guide explains how scheduling and testing windows work in practice.

Keeping the Credential Active

A CAT certification runs for four years. It follows ETA's general Maintenance pathway, not the Maintenance with Hands-On pathway. To maintain it, you submit the maintenance form and satisfy one of two requirements:

1. Continuing education: 10 hours per year, totaling 40 over the four-year cycle; or
2. Employer verification: qualifying supervisor-completed verification.

In either case, there is a maintenance fee of $25 per year, totaling $100 over the four-year cycle. Add that to your mental budget alongside the exam fee and any prerequisite or study costs when you evaluate the credential's return. If you are weighing the investment, Is the CAT Certification Worth It? and the CAT Salary Guide look at that question from the career side.

Where CAT Holders Work

Because the certification targets commercial and institutional environments, its natural employers are organizations that install, service or operate those systems. Typical settings include:

• Audio-visual and sound contractors who design and install systems for businesses and institutions
• Facilities and maintenance departments in schools, hospitals, campuses and large buildings that keep paging and distributed audio working
• Houses of worship and venues that rely on speech-intelligibility and music reinforcement
• Service and integration firms that troubleshoot and upgrade existing installations

The credential does not guarantee a job, and it does not replace field experience, but it gives employers a standardized signal that you understand the fundamentals behind system design and fault-finding. For a closer look at roles and employers, see CAT Jobs.

A Domain-Ordered Study Sequence

Rather than generic scheduling advice, it helps to order your preparation by how the domains build on each other. Here is one logical sequence that follows the physics and signal flow:

Troubleshooting is placed late deliberately: it is easier when you can draw on everything you have already learned. Adjust the pacing to your own background, spending extra time wherever your day job gives you the least exposure. A fuller preparation framework is in the CAT Study Guide: How to Pass on Your First Attempt, and a condensed review aid is the CAT Cheat Sheet. To check readiness under realistic conditions, use the CAT practice tests and work through timed sets that mirror the 100-question, two-hour format.

For readers who want more orientation on terminology and framing, the companion articles What Is CAT Certification? and CAT Training cover related ground, and you can start practicing right away on the main practice test site.

Frequently Asked Questions