MEASUREMENT OF PERCEIVED SOUND INTENSITY ACCOUNTING FOR INDIVIDUAL DIFFERENCES

Francesco Crenna, Matteo Panero, Giovanni Battista Rossi

Abstract

The measurement of quantities expressing the human response to some external stimuli is of great interest for metrology. In this paper some aspects of scale construction and measurement procedures are discussed, presenting different approaches, both direct and indirect, and focusing on the design of the panel test in order to obtain useful information for setting up the measurement scale and for the evaluation of its uncertainty.
The measurement of sound intensity is considered and a case study concerning the internal noise of container trucks operating in a port is presented. The following methods are considered:
- magnitude estimation;
- interval estimation;
- master scaling;
- indirect measurements according to A–weighted sound pressure level and Zwicker’s loudness.
Preliminary experimental results show the differences and criticalities among the proposed approaches, mainly due to the inherent inter and intra individual variability related to the perception itself and to its dependence on contextual factors.

Keywords

perceived quantity, sound intensity, panel testing.

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DOI

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IMEKO TC

TC1 - Education and Training in Measurement and Instrumentation

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