SAMSoft: Acoustic device automatic measurement system software

SEBASTIÁN P. FERREYRA; FABIAN C. TOMMASINI; GABRIEL A. CRAVERO; OSCAR A. RAMOS; JUAN I. MORALES; DAVID NOVILLO; JUAN F. LÓPEZ; ANA M. MORENO; LEOPOLDO BUDDE; HUGO C. LONGONI

Buenos Aires

Congreso; 22th International Congress on Acoustics; 2016

A common way to experimentally characterize a linear time-invariant acoustic system is by measuring its impulse response for each location of interest. Currently several methods exist for such purpose, being signal deconvolution the one which exhibits better performance. Moreover, measurement systems are usually aimed to particular applications, working with expensive platforms and proprietary software. In this paper design and development of specific software called SAMSoft, which manages an automatic measurement system for acoustic devices, are described. SAMSoft presents a modular, scalable and easy to upgrade design developed in Matlab, based on the model-view-control system pattern which enables source code reuse and simple functionality expansion. Application allows impulse response measurement with different excitation signals, time windows introduction to obtained measurements, time and frequency domain visualization, and spectral analysis in octave and one-third octave bands. It runs on ahardware based on a control unit and a mobile platform, being capable of measuring 360º in the horizontal plane with an angular resolution of up to 0.06º. Impulse response of different acoustic transducers measured showed a signal noise ratio of up to 40 dB in frequency bands under 100 Hz. In power measurements for octave and one-third octave bands a maximum error of 0.12 dB was obtained