Entries by Pat Brown

What does “Constant Voltage” Mean?

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“Constant voltage” is one of the more confusing terms used by the audio industry. Pat Brown brings clarification to this term.

Those new to the audio field are often dismayed by the subjective nature of many audio terms, which may … Read more

Room Survey 30 – China University of Communication

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Location: Beijing, China

Investigator: Pat Brown

Description:  Large recording studio (52,000 ft³) at university. Walls are combination of absorption and scattering. The room was partially occupied (about 60 people). With a T30 of about 0.6 sec, this room is not … Read more

Room Survey 29 – 9600-seat Auditorium

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Location: Southeast Christian Church – Louisville, KY

Investigator: Pat Brown

Description:  Low and medium Q source comparison. The low Q source is a dodecahedron. The medium Q source is a QSC K12. The distances are 30 ft, 60 ft, and … Read more

Room Survey 28 – Extreme Flutter Echo

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by Pat Brown

Mark Haymond sent me an interesting impulse response that serves as a great example of “flutter” echo. It was captured at a pistol range, where the shooter stands between two block walls, with an earth berm at … Read more

Room Survey 25 – Lakewood Church

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Location: Houston, TX

Investigator: Pat Brown

Description:  Former NBA arena converted to HOW. Website link. Measurements made within the coverage of the Left house line array. Also included are two RIRs of their production studio (last photo).… Read more

Room Survey 23 – Idlewild Baptist Church

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Location: Tampa, FL

Investigator: Pat Brown

Description:  Large HOW. Website link. Evening site survey done as part of SynAudCon Sound System Design seminar in October 2008. A-format recordings were decoded to B-format, which were decoded to XY stereo.… Read more