Photos of HEC projects
Dog kennels typically have six hard surfaces that reflect sound very nicely. Add 30 to 40 barking dogs and the sound bounces back and forth from wall to wall and up and down from floor to ceiling. This reflection of noise is called Reverberation Time (RT). In many kennels this noise will sustain for two to four seconds. An experienced acoustical engineer will tell you this is much too long. Sound reverberation amplifies the sound level. A frazzled kennel worker will tell you the sound level generated by 30 barking dogs is unbearable. John Knapp, an architect who designs dog kennels, published an article in the Pet Service Journal stating that he tries to treat one half of the total surface area with K13 spray on acoustical finish. The application should be thick enough to provide at least a .90 noise reduction coefficient (NRC). Mr. Knapp found that acoustical ceiling tiles don’t provide a high enough NRC to make a difference.HEC Technologies recently did a job for the Grundy County Animal Control Center in Morris, IL. Two inches of white K13 acoustical finish was applied on a rib metal deck with an NRC of 1.05. The top 4 foot of the 12 foot high walls were treated with 1 inch K13. Four foot was chosen because there was a natural break point at the windows and it allowed for pressure washing of the lower walls. The K13 treatment made a significant improvement in the noise level. HEC Technologies has also done outside dog runs to keep noise from disturbing nearby neighbors.