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Associates
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Experienced in the full range of acoustical engineering, audio-visual design services, vibration control, and seismic design.
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Cross-Spectrum.com
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Massachusetts firm offering sound and vibration measurement and consulting services for environmental, municipal, engineering and architectural applications.
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Marshall Day Acoustics
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Acoustics and noise engineering consulting firm that provides acoustical, environmental noise, and noise control design services, including concert hall and auditorium design, environmental noise assessments, and building services and industrial noise control.
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