Fem Simulations and Experimental Validation of Frequency Response Prediction for Acoustic Soundboards

Ausiello, Ludovico; Nocoletti, G

doi:10.25144/13793

Cited by 2 publications

(1 citation statement)

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“…In 15 for example, a setar with a small board surface of about 215 cm 2 was excited either with an impact hammer or with a B&K exciter characterised by a very large mass of 500 grams, which proved to have a severe impact on the gathered data. In, 7,8,24 as well as for this investigation, much larger and heavier boards are considered (their area being either 1200 cm 2 or 2400 cm 2 , and their total mass ranging from 190 grams up to almost 400 grams) with a transducer weighing about 50 grams, including the putty material used to position it. Specific experiments were performed to assess the sensitivity of the methodology on un-braced wooden plates, and the results (which will be presented shortly in follow-up article) confirm that by carefully choosing the exciter's position on the plates, there is no detrimental effects due its small additional mass, while all the benefits of an extended frequency range can be exploited.…”

Section: Sine-sweep Methods Applied To Acoustic Instrumentsmentioning

confidence: 99%

VARIABLE BRACING PATTERNS TO TUNE SOUNDBOARDS & MEMBRANE SPEAKERS

AUSIELLO,

PANI,

DURAN

et al. 2023

Acoustics 2023

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Section: Sine-sweep Methods Applied To Acoustic Instrumentsmentioning

confidence: 99%

VARIABLE BRACING PATTERNS TO TUNE SOUNDBOARDS & MEMBRANE SPEAKERS

AUSIELLO,

PANI,

DURAN

et al. 2023

Acoustics 2023

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Affordable wide-band measurement ecosystem for musical acoustics based on electro-dynamic transducers

Ausiello,

Ducceschi,

Duran

et al. 2024

Acta Acust.

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The variability in responses of acoustic instruments can be attributed to a combination of fluctuations in critical parameters of wood, such as density, stiffness, and strength, and design features such as body shapes or bracing geometries. Recent studies have successfully implemented the sine sweep method with small exciters to measure the acoustic response of guitars, yielding frequency responses with high coherence over a bandwidth reaching up to 8 kHz. This paper proposes validating a cost-effective measurement system which integrates electro-dynamic transducers and wide-band test signals (sine sweep and noise) against the traditional impact hammer method in the case of unbraced plates. Data from four actuators of different size and power will be presented together with a simple strategy to assess reliable and neutral excitation points, thanks to two complementary models which describe the interaction between exciter and plate. The paper will then showcase the applications of this measurement system in two scenarios. The first case study will focus on a cost-effective method for selecting acoustic wood, while the second will explore experimental real-time spectral analysis using pink noise. These case studies demonstrate the measurement system’s adaptability and immediacy, providing valuable insights for enhancing the design and performance of acoustic instruments.

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Fem Simulations and Experimental Validation of Frequency Response Prediction for Acoustic Soundboards

Cited by 2 publications

References 0 publications

VARIABLE BRACING PATTERNS TO TUNE SOUNDBOARDS & MEMBRANE SPEAKERS

VARIABLE BRACING PATTERNS TO TUNE SOUNDBOARDS & MEMBRANE SPEAKERS

Affordable wide-band measurement ecosystem for musical acoustics based on electro-dynamic transducers

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