Entries by Pat Brown

The Keele Tone-Burst Test

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Keele Tone-Burst Test

The Chicago, IL Sound Reinforcement for Technicians seminar has come and gone. One of the highlights was an evening presentation by DB Keele, Jr. Many of you know Don from his work at Electro-voice and Harman, and for his patents … Read more

FIR-ward Thinking – Part 1

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by Pat Brown

This is Part 1 of a series that will examine the use of FIR filters in sound reinforcement systems.

Introduction

Finite Impulse Response (FIR) filters (pronounced either “F-I-R” or alternately, like the tree) are the rage these … Read more

The Amplifier-to-Loudspeaker Interface

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By Pat Brown

Amplifier-to-loudspeaker Interface – is there anything special about hooking an amplifier to a loudspeaker? Here is a brief look at some parameters that can affect the sonic performance of this important interface.

The Ideal Case

Most analog … Read more

How Do Boundaries Affect Loudspeakers?

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By Pat Brown

Can a room boundary be a “tool of the trade” for the audio practitioner? This study will provide some insight on how boundaries affect loudspeakers.

It’s nearly impossible to mount a loudspeaker in a room without placing … Read more

Measuring RMS Voltage: Many Meters Will Do

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By Pat Brown

Pat Brown measures RMS Voltage using 5 difference meters and shares the results.

The Vrmsmax loudspeaker power test requires real-time measurement of the Root-Mean-Square (RMS) voltage of the noise stimulus. RMS measurements have been the subject … Read more

Error Sources in Loudspeaker Data

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by Pat Brown

The accuracy of sound system performance predictions are limited by a number of factors. These include but are not limited to the loudspeaker data.

Much good research has been done in recent years on loudspeaker data formats … Read more