Posts

Real-World Reverberation – PureVerb™

By Pat Brown

Learn about a software tool called PureVerb™ that can create natural sounding reverberation effects.

Reverberation effects can be added to recordings using a signal processor or wave editor. Most of these effects only allow a very limited … Read more

A Do-it-Yourself Guide to Computing the Speech Transmission Index

By Farrel Becker

In this article, Farrel Becker shares the steps required to compute the Speech Transmission Index (STI) from a measured impulse response.

The Speech Transmission Index (STI) is a method of measuring speech intelligibility in noisy and/or reverberant … Read more

Sound System Designers Site Surveys – Three things to Consider

By Pat Brown

Sound System Designers site surveys should include the Acoustical environment, Ambient noise and radio frequency survey.  Learn why these are so important.

Site surveys are a necessary part of all construction trades. The ground must be firm … Read more

Reductions in Speech Modulation

By Pat Brown

The Speech Transmission Index is a measure of the reduction of speech modulation by noise and reverberation in the environment. The essence of this method of clarity evaluation can be made obvious by simply observing the time … Read more

Early Decay Time – Wrap Up

By Pat Brown

In this article, Pat Brown addresses some subtleties regarding early decay time calculation and significance.

The Spring installment of our Newsletter featured an exposé on the Early-Decay Time and its relevance to the design of a sound … Read more

Early Decay Time as a System Performance Benchmark

By Pat Brown and Peter Mapp

In this article Pat Brown and Peter Mapp looks at early decay time as a system performance benchmark.

It’s been over 100 years since Wallace Clement Sabine did his ground-breaking acoustical study of the … Read more

Absorption Coefficients Clarification

By Pat Brown

Pat Brown helps the reader understand more about absorption coefficients.

A recent Syn-Aud-Con listserv thread brought out some interesting facts about absorption and absorption coefficients. A common definition of the unit of absorption, the Imperial Sabin, is … Read more

Sound Sources for RT Measurements

By Pat Brown

What’s the best way to measure reverb times? Balloon pops? Omni loudspeakers? This article compares multiple source types and presents some surprising conclusions that can greatly simplify the RT collection process.

Introduction

There have been some threads … Read more

Human Processing of Reflected Sound

A response to “Reverberation Time – What Could Be Simpler?”
By Steve Barbar

This is another perspective on the significance of reverberation time and early-decay time, and the relationship between the two.

I must preface the following with the acknowledgment … Read more

Reverberation Time… What Could Be Simpler?

 
Meaningful metrics – by Pat Brown

Modern measurement systems and Standards add both clarity and confusion to the determination of the reverberation time of a space.

The reverberation time (RT) is one of the most fundamental room measurements. It gives … Read more