THE ACOUSTIC ANALYSIS IS BASED ON THE FOLLOWING BUILDING DATA:

All analyses are calculated for a seated person, with ear-level being about 4 feet off the floor.   The Stage Area is calculated for a standing person, with ear-level being about 5-1/2 feet off the floor.

All analyses DO take into account the cancellation and amplification effects of the reflections off of the room surfaces, as well as the absorption of various frequencies by the room surface materials and the people in the room.   They also take into account a default average of 40 dB room noise due to HVAC systems, exterior noise and audience noise.

The analyses cover a 7 octave range - 200Hz to 20KHz.

The installed system achieves a GOOD intelligibility rating.

Deer Park Aiming Plot
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This plot shows the aiming points and coverage patterns for the system. The aiming plots are identical for for both versions of the room - WITH and WITHOUT Acoustic Treatments.

ACOUSTIC ANALYSIS: TOTAL SPL DISTRIBUTION.

This plot represents the Total SPL (Sound Pressure Levels) distribution in decibels (dB) over the entire room.   This analysis takes into account the cancellation and amplification effects of the reflections off of the room surfaces.

A drop of -3 dB or less over the coverage area is considered optimal, a drop of between -3 to -6 dB is acceptable, more than a -6 dB drop is unacceptable.

As the plots demonstrate, the SPL are evenly distributed over the entire room.

WITHOUT Acoustic Treatment, the range is from a High of 96 dB to a Low of 92 dB (overall).
The majority of the seating area is in the 96 dB to 93 dB range

The drop in this room WITHOUT Treatment is -4 dB overall, and -3 dB in the seating area, which is acceptable overall, and optimal for the seating area.

WITH Acoustic Treatment, the range is from a High of 96 dB to a Low of 90 dB (overall).   The majority of the seating area is in the 96 dB to 94 dB range

The drop in this room WITH Treatment is -6 dB overall, and -2 dB in the seating area, which is acceptable overall, and optimal for the seating area.

ALCONS Scores:

• Under 3 % = Excellent - Suitable for complicated messages and music.

• 3.1 % to 7.0 % = Very Good - Adequate for less complicated messages, or trained speakers.

• 7.1 % to 11.0 % = Good - Suitable for simple messages and well-trained speakers.

• 11.1 % to 15.0 % = Fair - Adequate for simple messages with expert speakers and trained listeners.

• 15.1 % to 20 % = Poor - Limit of acceptable intelligibility for simple messages and expert speakers and listeners.

• Over 20 % = Unusable - Unintelligible even for expert speakers and listeners.

The ALCons scores for this room, WITHOUT Acoustic Treatment, range from 4.47 % to 5.97 % overall, with the majority of the seating area being in the 4.47 % to 5.75 % range.

This is considered to be a VERY GOOD rating.

The ALCons scores for this room, WITH Acoustic Treatment, range from 3.26 % to 4.01 % overall, with the majority of the seating area being in the 3.26 % to 3.75 % range.

This is considered to be a VERY GOOD rating.

RASTI Scores:

• 0.75 to 1.00 = Excellent - Suitable for complicated messages and music.

• 0.65 to 0.74 = Very Good - Adequate for less complicated messages, or trained speakers.

• 0.55 to 0.64 = Good - Suitable for simple messages and well-trained speakers.

• 0.45 to 0.54 = Fair - Adequate simple messages with expert speakers and trained listeners.

• 0.30 to 0.44 = Poor - Limit of acceptable intelligibility for simple messages and expert speakers and listeners.

• Below 0.29 = Unusable - Unintelligible even for expert speakers and listeners.

The Rasti scores for this room, WITHOUT Acoustic Treatment, range from 0.62 to 0.67 overall, with the majority of the seating area in the 0.65 to 0.67 range.

This is considered to be a GOOD to VERY GOOD rating.

The Rasti scores for this room, WITH Acoustic Treatment, range from 0.69 to 0.73 overall, with the majority of the seating area in the 0.71 to 0.73 range.