Roemtech, LLC Announces U.S. Patent Award for Auto-HummBuster Ground-Loop Noise Elimination Circuitry, Patent No. 9,042,577

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DALLAS, Texas, June 16, 2015 (SEND2PRESS NEWSWIRE) -- Roemtech®, LLC is announcing the award of Patent #9,042,577 by the USPTO for its invention of a unique circuitry that automatically analyzes multiple audio inputs and checks for ground-loop noise that frequently plagues classroom audio systems. If the circuitry detects ground-loop noise on any input, it will immediately take action to eliminate that noise by automatically engaging internal ground-loop isolation transformers.

It is the first time that an amplifier can diagnose a ground-loop issue, detect which input is the problem and then fix it with a single push of a button. Once the microprocessor makes the proper settings, it stores them in memory so that even during a power outage, the settings can be recalled upon power-up. Roemtech markets this technology under the trademarked name Auto-HummBuster®.

The Auto-HummBuster technology is the culmination of eight years of research and development by Roemtech's engineering department. According to Roemtech, ground-loop noise is a common audio problem, especially in classroom audio systems. By working with end users and commercial dealers, Roemtech set out to find a solution that would make getting rid of audio noise much quicker and easier. Up until now, fixing ground-loop noise required that an experienced technician drive out to the customer, sometimes many miles away.

Once there, he had to diagnose the system and then put in ground-loop filters where necessary or meet with a certified electrician and make fixes to the existing 110V electrical wiring. Typically these service calls were time consuming and expensive. With Roemtech's new Auto-HummBuster technology, the end user can simply push the Auto-HummBuster button once and fix the problem himself.

CEO and President, D. Thomas Emlinger states, "The Auto-HummBuster technology is extremely effective, eliminating unwanted ground-loop noise in almost every case. When school CTO's who deal with classroom audio systems actually get a chance to hear a demonstration, they are blown away by how well it works. If you hear humming in an audio system, they aren't using an amplifier with Auto-HummBuster technology."

The PMA-350H classroom amplifier is the first amplifier to feature the patented Auto-Hummbuster technology and is currently available through authorized Roemtech audio-visual dealers only. It features three line level inputs, all of which are protected by the Auto-HummBuster technology. In addition to this, Roemtech says they have future amplifiers in development that will feature this technology.

For additional information about the Auto-HummBuster technology, visit or contact alex.b[at] or 972-221-3030.

About Roemtech, LLC:
The audio company is privately owned by D. Thomas Emlinger. He and his associates have spent nearly 10 years researching, developing and testing the PlenumAmp line. They currently have tens of thousands of units successfully installed in classrooms and conference rooms around the world with future products under development.


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REFERENCES: Auto-Hummbuster, pro audio, D. Thomas Emlinger, PlenumAmp line, classroom audio systems, US patent, hum elimination, news, press release from Roemtech, LLC, Jun 16, 2015, Patent and Trademark, Education, Electronics, Dallas, Texas, Roemtech, LLC Announces U.S. Patent Award for Auto-HummBuster Ground-Loop Noise Elimination Circuitry, Patent No. 9,042,577