Figure 1. Family of RT curves for a large reverberant auditorium; note the lower times of the EDT curve.
Audio

Sound Decay: Where’s The Point? – Part 3

“Sound decay” sounds like a disease that decrepit concert halls might suffer from, but that’s not what I mean. The … 0 94
Audio, Installations

NCAA’s Coors Center Upgrades Audio

PA system replaced after 35-year run.0 501
Audio

Software Problems: A Glitch In The Matrix?

Troubleshooting decentralized, open-architecture DSP mixers.0 310
induction loop
Audio

Induction Loop Technology: Gotcha!

You're not going to get away with brute forcing this technology.0 602
Figure 1. Analog linear voltage and non-linear dB scales.
Audio

Accuracy: Where’s The Point? – Part 2

Last month, I discussed the differences between accuracy, precision and resolution when making some voltage/frequency measurements. In audio, however, we … 0 305
Figure 1. Digital meter readout.
Audio

How Accurate Are Audio & Acoustic Measurements?

Where’s The Point? Part 10 491
Audio

Zoning In On Sound Masking

Need trumps cost.0 465
Audio

Cutting Through The Noise

The architectural trend toward open offices provides a unique opportunity for integrators.0 516
Figure 1
Audio, Video

HDBaseT 101 – Part 1

Nearly 40% of integrators are already deploying or working with HDBaseT technology, and that number is expected to grow.0 982
Audio

STIPA & Intelligibility

The ‘Do you understand the words that are coming out of my mouth?!’ test. 0 350
fcc
Audio

Wireless Mics & The FCC Incentive Auction

Important facts on the FCC Incentive Auction for AV integrators.0 1609
Figure 1. TV set with rear-facing loudspeakers; furniture mounted in room corner.
Audio

Nice Picture. Pity About The Sound!

Why TV sound is so poor.0 1187
Figure 1. Measured RT and EDT using a dodecahedron loudspeaker compared with RT and EDT with the new sound system as the source.
Audio

Chesapeake Energy Arena Measurements & Analysis

Marsh/PMK International was initially engaged to study the existing acoustical conditions and sound system performance at Chesapeake Energy Arena as … 0 310
listen-technologies-assistive-listening-man-at-stadium
Audio

The Assistive Listening Playoffs

Which system is best suited to stadiums and arenas?0 535
Audio

Hearing Loops Get The Vote

Hearing-impaired individuals prefer this assistance system.0 1078
Energy Masking
Audio

Energy Masking: Reducing Distraction & Achieving Privacy

Improving methods for reducing distraction and achieving privacy.0 626
Audio

Lobbies Getting Louder

Hotel lobbies have become hipster hangouts and alternative music venues. Properties like the Ace Hotel locations in New York, Pittsburgh, … 0 371
Figure 1. Two very different sounds with identical dBA values.
Audio

Single-Number Metrics

What’s Their Value?0 765
Audio

How Loud Should A System Be?

Most clients are not comfortable speaking in terms of “dBs.”0 1081
pag-nag feedback solution
Audio, AV Police Squad

Stop Feedback At Its Source!

PAG-NAGs and why they rule.0 1449
Figure 1. Unbalanced auditorium RT characteristic and target curve.
Audio

A Question Of Balance: Good Acoustics Need A Balanced Approach

Part of my job is to review the work of others or proposals from contractors and installers. This can be … 0 816
Audio, AV Police Squad

Setting Mic Levels To Combat The ‘Yelling Crawler’

I had the privilege of watching an IT guy setting microphone levels the other day. It was a difficult room … 0 1700
Average threshold of hearing at 20kHz versus listener age.
Audio

Sound: It’s Not Just About Listening

All day, every day, and all night, every night, we are surrounded by and exposed to sound. Unlike our sense … 0 969
Audio

The Role Of Audio In Themed Entertainment

Many of you know that famous George Lucas quote that “Sound is 50% of the movie-going experience.” For those of … 0 840
Audio

Good Reference Materials For Acoustics & Audio System Design Are Key

Over the years, I have collected a technical library of around 200 books about audio and acoustics, and it’s my … 0 1535
Figure 2. Sub response shaped by applied DSP where each pair has increasing delay applied from the inside pair on the C/L to pairs 2, 3 and 4, moving toward the outsides of the horizontal array.
Audio

For The Love Of Mic…Put That Subwoofer Somewhere Else!

Using prediction software can put subwoofers where they should be. Subwoofers are the red-headed stepchildren of audio integration. They’re always … 0 1731
Hannah Boyd Photography 
Audio

Subs Are Key To Church Audio Installation

A challenging installation took place recently at the 800-seat Dan River Church in Danville VA, where a subwoofer solution resulted … 0 557
Audio, Industry Pioneers

Industry Pioneers #3: Dr. Harvey Fletcher And The Rise Of Applied Physics

This article was originally published in the October 2000 issue of Sound & Communications. By the end of the 19th Century, … 0 681
1) basic mixer, (2) DSP with matrix mixer, (3) zone processor, (4) production mixer.
Audio

Same Name, Different Purpose: The Apples And Oranges Of Audio Mixers

“You’re selling me a digital mixer for my conference room that is several times more expensive than the one I … 0 1100
Audio

Acoustic Echo Cancellation (AEC) Explained

One of the key features on DSP units is Acoustic Echo Cancellation (AEC). This feature is not usually found in … 0 633
Audio

Silence Of The Cams

Whereas I often wear a set of noise-canceling headphones on a plane, I have always wondered how effective they are. … 0 621
mixer slider - house of worship
Audio

RS232 Overload

Checklist Item Under Test: 3.4.17: The port and processor are of an adequate size and buffer given their intended function. … 0 721
Club Neo in Zurich is a dazzling new club/bar/restaurant on the ground floor of an upscale high rise.
Audio

Acoustic Design: Beautiful, Effective & Invisible

Dramatic leaps in acoustic design and technology have enabled acousticians to provide clients with a myriad of options for tuning … 0 1535
Audio, AV Police Squad

Audio: It always depends.

I always teach my colleagues, my students…heck, even my 2 and 5 year olds, that you should set the microphone … 0 1296
The Heathkit CR-1
Audio

What Were You Doing In The 1950s?

I’m going to take a journey off the usual beaten path this time. There won’t be any discussions about wireless, … 0 894
Headphone-Frequency-Response
Audio

Ear Peace

In last month’s column (“Sex & Audio”), I mentioned how there are distinct differences between male and female sound preferences … 0 951
audio feedback
Audio

The Figure-Eight Feedback: Why ceiling mics and mix-minus shouldn’t mix.

Checklist Item Under Test: 6.31: Confirm that the speech reinforcement system is stable (no feedback) for the entire talker and … 0 1182
Audio

Sex & Audio: A Clear Case Of Discrimination!

Various studies have been carried out over the years that show clear differences between how males and females listen and … 0 1342
The Albuquerque City Council Chamber. Photo: Stephen Frazier
Audio

Hearing Loops: Assistive Listening Systems That Are Actually Used

After years of neglect, the federal government recognized the special auditory needs of the hard of hearing in the Americans … 0 863
Audio

Gymnatorium Absorption: The Sweet Spot

Although acoustic absorption is not usually the focal point of an install, it should not be discounted. You may not … 0 751
Audio

Aid Memoire! A Follow up to ‘Loop Gain’

It would seem that my September and October 2015 discussions have sparked more interest than almost any other I have … 0 597
Audio

Condenser/Dynamic Mics

“When I look at the proposal for this system, I see there are multiple mic options available. Some of it … 0 559
Audio

Trust: Building it is Hard and Keeping it is Harder

Checklist Item Under Test: Report Signature: “I hereby certify that, in accordance with specification in product, practice and performance, this … 0 601
Audio

Sound Advice: On The Level Part 2: Peak Demand

Last month, I discussed the various sound level meter frequency weightings and integration times, and how these can affect the … 0 540
Audio

Achieving An Effective Sound Masking Curve

Recent design trends make today’s facilities ever more dependent on sound masking for speech privacy and noise control. Because a … 0 906
Audio, Industry Pioneers

Industry Pioneers #2: Bell, Edison And The Dawn of Telephony

This article was originally published in the June 2000 issue of Sound & Communications. It should come as no surprise that … 0 644
Audio

The A, B, C To Z Of Sound Level Measurement

The other day, I was discussing signal-to-noise ratio (SNR) with a colleague and bemoaning the fact that many research papers/articles … 0 657
Audio, House Of Worship, IT/AV, Video

Producing Mega Experiences With Scott Mirkin

Forty large LED screens brought Pope Francis closer to audiences in Philadelphia. Although event producers have successfully used digital media … 0 970
Audio, Installations

Bojangles’ Coliseum Stays Competitive With New Audio

If you like to root for the underdog, then Bojangles’ Coliseum warrants your attention. The 9600-seat venue sits in a … 0 739
Courtesy Monte Bros.
Audio, House Of Worship

Cathedral Basilica Of Saints Peter And Paul Audio

In mid-August, I received a call from Fr. Gerald Gill, the rector of the Cathedral Basilica of Saints Peter and … 0 686
Audio

Validation: Caring About The Process Is Key

My manager at a hi-fi store years ago told me the secret to selling anything. First, recognize that the customer … 0 494
assistive-listening
Audio

Loop Gain—x2 It’s all about listening!

Last month’s piece about hearing aids and assistive listening devices seems to have struck a chord with many readers and, … 0 533
Audio, Business, Video

Coaxial Cable Is Still A Player

Ring out the old, ring in the…old? Last June at InfoComm, my industry colleague Malissa Dillman of Kramer Electronics taught … 0 1095
Audio

What Is Sound?

Become a Brain Surgeon in just 15 Minutes a Day! Okay, maybe not. Have you ever been asked to describe … 0 525
Audio

Loop Gain—With A Difference

Audio frequency induction loop systems. About 10% to 14% of the general population (US and Northern Europe) suffers from a … 0 515
Audio

No License? No Problem!

FCC issues new wireless/white space rules. On August 6, 2015, the Federal Communications Commission (FCC) released new rules concerning wireless … 0 478
Audio

Under Cover: What’s 6dB between friends?

As is well known, the nominal coverage angle of a loudspeaker is defined by its off axis, 6dB down points. … 0 577
Audio, Industry Pioneers

Industry Pioneers #1: Lord Rayleigh 1842-1919

This article was originally published in the February 2000 issue of Sound & Communications. In this series of articles, we will … 0 803
Audio, Installations

Technology Fulfills Holland Performing Arts Center’s Needs

“The times they are a-changin’.” Bob Dylan’s lyric aptly applies to the Peter Kiewit Concert Hall at the Holland Performing … 0 590
Audio, News

Hear Today, Gone Tomorrow: Some factors that affect our hearing perception.

The other day, I was setting up a fairly sophisticated and unusual paging voice alarm system and was checking out … 0 491
Audio, Digital Signage, News, Video

Cinema Sizzle: Getting into the show.

Movie theaters are not just for movies anymore: They are now upscale venues offering the flair of Hollywood for all … 0 508
Audio, Business

Playing the Numbers Game: Who is Responsible When it all goes Wrong?

Last month, I noted that some of the current STIPA meters do not meet the current (or even recent) standards … 0 514
Audio

Digital Wireless Mic Frequency Coordination Part 1: I should have known there was an app for that.

Checklist Items Under Test: 6.35: For wireless microphone systems, with all wireless microphones turned on, confirm that, throughout the specified … 0 564
Audio, IT/AV, Video

Caution! Merging Buses Ahead!

I would guess that a few readers of “AVent Horizon” are old enough to remember the Firesign Theater, a comedy … 0 452
Audio, Installations

Getting Students Involved

Seating in the Colony High School auditorium varies, and the room is used for theatrical presentations, concerts, school and community … 0 609
Audio, Installations, IT/AV, Video

The Backbone Of Healthcare: Tyler Junior College’s technology-enhanced classrooms.

In response to the critical need for nursing and other healthcare professionals in the state of Texas, Tyler Junior College … 0 538
Audio, IT/AV

Audio Over IP: Easy On The Budget, With Futureproof Design

Adoption of “audio-over-IP” technology is increasingly prevalent, and it’s a market presence worth discussing for systems integration. In basic terms, … 0 513
Audio, Business

Wireless vs. LTE Devices: The battle over 600MHz white space.

The Federal Communications Commission’s (FCC) broadcast television spectrum incentive auction has been a source of consternation and hand-wringing from parties … 0 811
Audio, News

The State Of The Audio Union

Last fall, I was attending a Dante symposium presented by Audinate in New York City. Shortly after lunch, while waiting … 0 476
Audio, IT/AV, News

It’s Time to Dive Into Audio Networking

Commercial and installed audio is at a crossroads. The inevitable merging of computer networking technology and audio distribution is here; … 0 514
Audio, News

Versatile, Timeless & Indispensable

For years, patch bays have provided critical flexibility and convenience to media facilities of all types, including studios, entertainment venues, … 0 377
Audio, News

Versatile, Timeless & Indispensable

For years, patch bays have provided critical flexibility and convenience to media facilities of all types, including studios, entertainment venues, … 0 379
Audio, News

Measure for Measure: Does your STIPA meter read the same as mine?

My comments on intelligibility in the February issue sparked a flurry of emails and questions concerning the measurement of STI … 0 535
Audio, News

When Manufacturers Go Bad

Checklist Items Under Test: Several, really, but for this story, 6.33: For conferencing mode, at the 65dB-SPL listening level, be … 0 412
Audio

Speech Intelligibility

A recent discussion with another consultant and client made me realize that many people, who I thought should know better, … 1 611
Audio

Word of Mouth

These days, I seem to watch more movies on planes than anywhere else. Although an enjoyable distraction, this is way … 0 460
Audio

A Tale of Two Mixers

Checklist Items Under Test: 6.33: For conferencing mode, at the 65dB SPL listening level, be able to demonstrate full duplex … 0 449
Audio

Speech Privacy: Dealing with work environment and legal requirements

Picture a typical office environment that you’ve worked on as a systems integrator. What does it look like? Chances are, … 0 821
Audio

Some End Of Year Thoughts: Apples, oranges & onions.

It has been an interesting yet frustrating year for me. Interesting in that some new and rather different (i.e., challenging) … 1 408
Audio

Some End Of Year Thoughts: Apples, oranges & onions.

It has been an interesting yet frustrating year for me. Interesting in that some new and rather different (i.e., challenging) … 1 474
Audio

Ranking The Senses: Is hi-res audio worth the effort?

High-resolution audio differs from high-definition video in some important respects. Frankly, video systems are generally easier to design. Although they … 0 477
Audio

Steering Columns In The Right Direction

All photos: Meyer Sound Digital beam steering offers a myriad of options. Column loudspeakers were a trendy choice in the … 0 951
Audio

Fools With Tools

Computer programs: boon or bane? About 15 years ago, if I had been asked if I made much use of … 0 460
Audio, IT/AV

Giving Fans More

Sooners AV distribution gets an upgrade. When the University of Oklahoma (OU) in Norman decided to do a major upgrade … 0 567
Audio

Sound Advice: Word Of Mouth, Part 4

Foot in mouth. One of the more interesting features of my job is that I get to travel around the … 0 427
Audio, Installations

Visual Beauty, Acoustic Challenge

Bridling marble to implement smart AVL. The Venetian (venetiannj.com), a large event and reception facility in Garfield NJ, gets raves … 0 499
Audio

The Commish: Stereo Audio Over One Cable

Why does the laptop sound so funny? In the AV industry, the end users are typically represented by two separate … 0 459
Audio

Word Of Mouth: S.O.V.: Save Our Vowels | Part 3

There can be little doubt, unless you are a DJ, of course, that good high-frequency performance from a sound system … 0 518
Audio

But The Spec Said… Who can you trust?

In the AV industry, the end users are typically represented by two separate yet equally important groups: the designers who … 0 449
Audio

CBC & ADA: Complying with new rules is the right thing to do.

Editor’s Note: You may have read some general information about the changes in the California Building Code as it relates … 0 415
Audio

CBC & ADA: Complying with new rules is the right thing to do.

Editor’s Note: You may have read some general information about the changes in the California Building Code as it relates … 0 547
Audio, IT/AV

New Directions For Integrators

Themed attractions offer crossover opportunities. Two Las Vegas-based integrators apply what they’ve learned serving the nightclub and casino markets to … 0 494
Audio

We’re From The Government: Will they shut down your wireless mics?

If you’ve been following the news lately, you know that the Federal Communications Commission (FCC) voted 3-2 back in May … 0 428
Audio

The FCC And Pro Wireless: Are we there yet?

The Federal Communications Commission (FCC) has had regulatory oversight of wireless microphones since rules were established for their operation in … 0 467
Audio

The Language Of Audio Conferencing: You don’t speak DSP? Do you know someone who does?

In the AV industry, the end users are typically represented by two separate yet equally important groups: the designers who … 0 526
Audio

Personal Audio Tune-Up: For the price of a plug-in, make an investment in yourself.

There are a few things about the analog signal processing era that I miss. One I miss most is the … 0 496
Audio

The Audio Envelope

We generally end up picking our own poisons. A recent (and rather spirited) debate in an online audio expert group … 0 983
Audio

Acoustician’s POV: Dining With Loudness

Do you want ear-splitting noise and migraines with that order? “What?” “I SAID, Mayor Di Blasio ought to pick up … 0 422
Audio

Sound Advice: Do Computers Have Ears?

Do you want ear-splitting noise and migraines with that order? Last month, I discussed how a number of manufacturers are … 0 406
Audio

Glass + Audio Challenge

Audio design at Toledo Museum of Art’s Great Gallery. Audiovisual integrators know that “glass” and “good acoustics” are typically mutually … 0 614

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