Thornton Acoustics & VibrationsConsulting Engineers in Acoustics Vibrations and Noise Control, of Pittsburgh PA adheres to recognized measurement standards and best engineering practices. We employ advanced engineering methods using top-of-the-line, state-of-the-art equipment for every project. Procedurally, we follow the appropriate parts of the ANSI, ASTM, and ISO.

This advanced technology is provided to clients throughout North America and in the many states surrounding Pittsburgh PA including Ohio (OH), New York (NY), Maryland (MD), West Virginia (WV), and Virginia (VA).

As noise and vibration control engineers, noise consultants, acoustical consultants, and vibration control consultants, and architectural acoustics consultants, the firm uses state of the art instruments and equipment to follow best available practice in acoustics, vibrations, and noise.

Acoustical and noise evaluation procedures are consistent with good practice and the appropriate parts of the ANSI and ASTM standards that include:

ANSI S1.13-2005 Measurement of Sound Pressure Levels in Air

ANSI S12.18-1994 Procedures for Outdoor Measurement of Sound Pressure Level

ANSI S12.9-1993/Part 3 Quantities and Procedures for Description and Measurement of environmental Sound Part 3" Short-Term Measurements with an Observer Present

ASTM E1014-84 Standard Guide for Measurement of Outdoor A-Weighted Sound Levels

Field sound level measurements are made with ANSI Precision Type I Bruel & Kjaer 2250 Sound Level Meters equipped with octave, third octave, and narrow band filters. Meters have a 120 dB dynamic range with sound recording. These Type I instruments meet the strict requirements for precision work.

Vibration measurements are made with PCB accelerometers along with a wide array of related transducers.

Measurements of acoustics are performed with precision B&K Microphones and PCB Array microphones along with GRAS High Frequency/High Amplitude Microphones.

Seismic measurements are made with PCB low level seismic transducers specifically designed for micro-g site measurements for MRIs and CTs.

Sound intensity is performed with GRAS microphones and intensity probe couple with a B&K Pulse System with a 160 dB Dyna-X Frontend.

Modal analysis is done with PCB force hammers and accelerometers coupled with a B&K Pulse System.

Spectral analysis of sound and vibration signals is done with a B&K Pulse System with a 160 dB Dyna-X Front-end which is cutting edge technology.

Community noise measurements are made with B&K Outdoor Microphones and B&K Sound Level meters supported by the B&K pulse system.

FIIC measurements are made with a tapping machine.

Reverberation measurements are made with GRAS array microphones that are used with B&K Reverb time software of the B&K Pulse System.

FSTC measurements are done with high performance JBL speakers, QSC & Crown amplifiers, and GRAS array microphones. Readout is done with both B&K Precision Type I sound level meters and the B&K Pulse System.

Sound Power Measurements are either made with the sound intensity system using the Sound Intensity Method or by using the comparison method which relies on a B&K Reference Sound Source 4204.

Calibration of microphones is done with a piston phone calibrator and a Spectronics Precision Plane Wave Tube.

Vibration field calibrations are done with PCB Precision Vibration Calibrators.

© 2017 Thornton Acoustics & Vibrations, Consulting Engineers in Acoustics,Vibrations & Noise Control;
Pittsburgh, PA| | Phone: 724.265.2000