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Room Survey 29 – 9600-seat Auditorium

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 120 ft. Sources are center stage. The zip file contains six room impulse responses. Read more

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Room Survey 28 – Extreme Flutter Echo

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 one end (Fig. 1). The flutters are about 55 ms apart, giving an almost reverberant impression, but the stepped Schroeder curve reveals that this is definitely not reverberation (Fig. 2). Read more

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Church Attendance Influences Room Acoustics

by Richard Honeycutt

Richard does a beautiful job showing how reduced attendance can influence room acoustics.

The demographics of churches are changing, and the change definitely brings acoustical issues. As an example, I’ll use a church with acoustical and sound issues that I have helped for several decades. Read more

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Room Survey 27 – St Michael’s Catholic Church

Location: Cannelton, IN

Investigator: Pat Brown

Description:  Loudspeaker comparison made in reverberant church. Distances are 6 m and 12 m. Read more

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Room Survey 26 – Oklahoma City Civic Center

Location: Oklahoma City, OK

Investigator: Pat Brown

Description:  Performing arts center. Website link. RIRs of house sound system. Here is an article describing the session. Read more

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Room Survey 25 – Lakewood Church

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

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Room Survey 24 – Pinnacle Presbyterian Church

Location: Phoenix, AZ area

Investigator: Pat Brown

Description:  Reverberant HOW. This is a comparison of the house line array with a med Q coaxial source on stage. Read more

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Room Survey 23 – Idlewild Baptist Church

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

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Room Survey 22 – Scottish Rite Cathedral

Location: Indianapolis, IN

Investigator: Pat Brown

Description:  Source on stage. Test position 1 is on-axis with source at distances indicated in IR file names. Raked seating means that later measurements are off-axis vertically. Link to website. Read more

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Room Survey 21 – Hotel Meeting Room Line Arrays

Location: Indianapolis, IN

Investigator: Pat Brown

Description:  Hotel meeting room. Active vs. passive line array comparison. Read more