Posts

Error Sources in Loudspeaker Data

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

A Closer Look at Loudspeaker Coverage Angles

By Jeremy Johnston

In this article, Jeremy compares the coverage angles of 3 full range loudspeakers 90°x40°, 90°x50° and 90°x60°.

Most loudspeakers used in sound reinforcement have some sort of Pattern Control Element (PCE – a new term I just … Read more

Far-field Criteria for Loudspeaker Balloon Data

By Pat Brown

Measuring the far-field criteria for large devices is different than small devices.  In this article, Pat will give you some things to consider as well as guidelines.

The most common reference distance for loudspeaker SPL specifications is … Read more

Low-Frequency Directivity and Arrays

By Pat Brown

This article is an attempt to quantify the theory and application of low frequency arrays for sound reinforcement applications.

The lack of low frequency directivity is a problem that plagues many sound systems. It is usually manifested … Read more

Not Exactly Omni – A look at Human Listener Directivity

By Pat Brown

The article is the results of a study on human listener directivity.  The mic was place inside the ear canal and measurements were taken.

A recent Syn-Aud-Con Listserv thread brought up the subject of human listener directivity. … Read more

Interpolated Balloons

By Jeremy Johnston

Jeremy Johnston addresses this question, “What are interpolated balloons?”

When we use modeling programs to predict the direct field coverage of a loudspeaker system in a space, we depend on the loudspeaker model to show all of … Read more

Ideal vs Real Loudspeaker Directivity

By Pat Brown

Understanding the ideal loudspeaker directivity will form an understanding of the trade-offs involved in real-world devices.

When it comes to loudspeakers and the audio marketplace, one word comes to mind-diversity. How can there be so many different … Read more

Measured vs. Predicted Loudspeaker Array Response

 Meaningful Metrics – By Pat Brown

Many designers use arrayed loudspeakers to cover the audience. Computer modeling must be used to determine the array behavior. This study compares the measured vs. predicted response of a 3-horn array.

Room modeling programs … Read more

The Magic Behind Multi-Pattern Mics

Theory and Practice – By Dale Shirk

This article will take a closer look of how multi-pattern mics work.

Multiple pattern microphones have been used in studio work for years, and today are becoming very common in live sound as … Read more

What's a DLL? and when do I need one?

By Pat Brown

This article addresses some specifics of the direct field prediction process, specifically the sound radiation patterns from loudspeaker arrays and if DLL is a useful too.

The predictions performed by acoustic prediction software can be divided into … Read more