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REVERBERANT TESTING

What is Reverberant Testing?
Reverberant testing measures the sound made by a piece of equipment. Reverberant rooms are constructed with reflective materials that allows us to measure only the sound created by the equipment. The Energistic's room is constructed to the ANSI S1.2 standard.

Two types of tests are performed in reverberation rooms. They measure "radiated" and "discharge" sound levels. In a radiated test, the ducts connected to the terminal device are wrapped, preventing any sound from escaping. Therefore, the sound level measurements in the radiated test reflect only the sound emitted from the terminal device. In a discharge test, the terminal device is placed outside the room in order to measure the level of discharge sound that would be created by the terminal device.

When is Reverberant Testing Used?
Reverberant testing is typically used by manufacturers as a way to compare a product's sound power level to industry standards. Reverberant testing may also be used to compare the noise level of different products under the same conditions. This information allows for a parity comparison of noise levels among several pieces of similar equipment.

At Energistics, we primarily test terminal equipment, including variable air volume boxes, fan-powered boxes, grilles, registers and diffusers. Our testing measures the level of noise created by these terminal units. Typically, a product is tested at several different octave bands - usually within a frequency range of 125 to 8,000 hertz, the bands commonly recognized by the human ear.

Successful Reverberation Room Testing
There are several components to a successful reverberant room test. First, the test product must be constructed exactly as it will be in production. Second, the testing setup must be constructed according to industry standards. These standards specify setup of the test instrumentation that must be used and the specific setup of the room. Finally, the instruments must be calibrated immediately prior to the test, and no noise may pervade the test space. If any of these requirements are not met, the test cannot be considered valid. Should the equipment run louder than the manufacturer's specification, Energistics has the ability to work with the product manufacturer to improve the equipment's performance.

 

SERVICE

Reverberation Testing

Mockup Room Testing

Curtainwall/Diffuser Room Testing

AHU Mockup Room Testing

Miscellaneous Testing