Profile: Dynamic Instruments, Inc. specializes in manufacturing industrial and military voice recording & instrumentation products. We provide communication and vibration products. Our communication products include voice loggers, desktop software, CTI solutions, tactical mobile recorders and central storage. Our vibration products include portable analyzers and shakers. We offer DI-811A, transducer test set, which is a portable, self contained shaker system that can be used to verify a transducer's calibration, or as a test stimulus for a vibration analysis system.