Archives of Acoustics, 38, 1, pp. 19-26, 2013

Educational Implementation of a Sound Level Meter in the LabVIEW Environment

Robert BARAŃSKI
AGH University of Science and Technology
Poland

Grażyna WSZOŁEK
AGH University of Science and Technology
Poland

As a consequence of recent implementations of EU Directives related to noise protection more and more students of various AGH-UST programs are introduced to the basics of acoustic measurements. Students at various levels of theoretical background in the field of acoustic measurements are offered practical training in measurements using digital sound analyzers. The situation would be optimal if each student could have a device at his/her own disposal. Unfortunately, such a situation is not possible at the moment because of various reasons.

With the above problem in mind, a dedicated software package has been developed, implemented in the LabVIEW environment, which allows detailed studies of problems related to the acoustic signal measurement using sound level meters, as well as tasks in spectral analysis (1/1 and 1/3 band filters) and narrow-band (FFT) analysis. With such organization during the introductory laboratory classes each student is offered a direct individual contact with a virtual device that is properly pre-programmed for realization of a well-constructed learning process. It definitely facilitates understanding of the essence of acoustic signal measurements and provides a good basis for further laboratory work carried out as a team-activity.
Keywords: LabVIEW; acoustics; sound level meters; microphones; free-field investigation; frequency responses.
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