[ GRAPHIC SPECTRUM EQUALIZERS, PISTONPHONE ADAPTERS, AUDIOMETER CALIBRATION SYSTEMS, AUDIOMETER CALIBRATORS, ENVIRONMENTAL NOISE CLASSIFIERS, COMPUTING NOISE MONITORS, ] MICROPHONE ENERGIZERS AND MULTIPLEXERS, [ CALIBRATION CONTROL OSCILLATORS, AND ACCELEROMETER KITS ]

INSPECTION AND REPAIR OF PRECISION INSTRUMENTS AND SYSTEMS EMPLOYED IN MEASURING, RECORDING AND ANALYZING SOUND AND VIBRATION PHENOMENA

CONDUCTING TRAINING SEMINARS FOR OTHERS IN THE SOUND AND VIBRATION MEASUREMENT FIELD

SYSTEMS ENGINEERING SERVICES RENDERED TO OTHERS FOR THE DESIGN, CONSTRUCTION AND INSTALLATION OF PRECISION INSTRUMENTS AND SYSTEMS FOR MEASURING, RECORDING AND ANALYZING SOUND AND VIBRATION PHENOMENA