Test Equipment and Modeling Capabilities
Quietly Making Noise has made a significant investment in acoustical testing equipment and has developed proprietary software tools for acoustical modeling. Other equipment is rented as needed.
The available test equipment includes the following:
- Type 1 Sound Level Meter – Norsonic Type 118 with Norsonic Type 1225 one-half inch microphone
- Type 1 Sound Level Meter – Norsonic Type 140 with Norsonic Type 1225 one-half inch microphone
- Norsonic Type 1251 calibrator
- Noise Generator (pink and white) – Ivie Technologies, Incorporated IE-20B
- Tapping Machine – Norsonic Type 211A
- Loudspeakers – Two JBL PRX535 powered loudspeakers, 15”, 650 W continuous, 1,300 W peak at 8 ohms (each speaker)
- Loudspeakers – Two JBL PRX412M powered loudspeakers, 12”, 300 W continuous, 1,200 W peak at 8 ohms (each speaker)
- Subwoofer – One JBL PRX518S powered subwoofer, 18”, 500 W continuous, 1,000 W peak at 8 ohms
- Behringer Model X1222USB and X1202FX XENYX Mixers
- dbx DriveRack PX powered speaker optimizer
Proprietary software tools have been developed for the following types of acoustical analysis:
- Acoustical modeling of near field and far field sound levels for complex facilities
- Design and modeling of acoustical enclosures
- Design and modeling of acoustical barrier walls
- Design and modeling of silencers
- Calculation of transmission loss and sound transmission class (STC) ratings
- Calculation of absorption coefficient and noise reduction coefficient (NRC) ratings
- Calculation of impact sound pressure levels and impact insulation class (IIC) ratings
- Calculation of insertion loss values
- Calculation and modeling of source sound power levels and sound pressure levels for
industrial equipment, traffic, aircraft, trains, community noise, and other noise sources
All software tools have been verified through many years of actual field test and laboratory test experience.