Field calibration and verification of sound intensity systems

The calibration of heart sound intensity.

There is no standardized mnethod for the calibration of total energy conducted to the surface of the chest caused by the cardiac sounds. Loudness is a subjective term which is dependent upon total energy, frequency of the main components and the specific sensitivity of the human hearing mechanism. A method is described in which the amplitude of the chief component of the heart sounds is compare...

Electroacoustic calibration for sound field warble tone thresholds.

Walker, Dillon, and Byrne (1984) suggested reference equivalent threshold sound pressure levels (RETSPLs) for warble tones with specific modulation parameter values audited from a test position at the critical distance in a semireverberant sound field. This study evaluated these RETSPLs in two typical audiometric rooms and with typically encountered FM tones. Thresholds were measured under earp...

Statistically Sound Verification and Optimization of Black-Box Systems

Intelligent Surveillance and Calibration Verification in Power Systems

The intelligent approach to instrument surveillance and calibration verification described here was developed for use in nuclear power plants utilizing digitized data available in the Plant Computer. Data from Florida Power Corporations Crystal River #3 Nuclear Power Plant was recorded and applied to a five-layer autoassociative neural network (AANN) which is trained using a special robust trai...

Statistically Sound Verification and Optimization for Complex Systems

This paper discusses verification and optimization of complex systems with respect to a set of specifications under stochastic parameter variations. We introduce a simulation-based statistically sound model inference approach that considers systems whose responses depend on a few design parameters and many stochastic parameters. The technique iteratively searches over the space of design parame...