Project

ACADIA

Click here: ACADIA project movie

ACADIA

PN-III-P4-PCE-2021-0885 Qualitative, dynamic and acoustic analysis of anisotropic systems with modified interfaces (click aici) - ACADIA, contract no. PCE61/2022

Duration: 31 months (02.06.2022 – 31.12.2024)

The total budget: 250000 euros

Source of funding:  UEFISCDI (https://www.uefiscdi.gov.ro/); national competition PCE2021.

The general objective of the project 61PCE/2022 "Qualitative, dynamic and acoustic analysis of anisotropic systems with modified interfaces" (ACADIA) was to explore, through different research methods, the mechanical, dynamic and acoustic properties of wood in the construction of stringed musical instruments, both as anisotropic systems with different structures and interfaces due to the texture and design of the wood, and as multi-body systems whose macrostructural properties give the musical instrument its special acoustic qualities, highlighting the contribution of the surface treatment of the resonance wood in the construction of musical instruments (violins).

The novelty of the project consists in the frontier and interdisciplinary research of resonance wood, as well as of wood treated by surface treatments, modifying elastic and acoustic physical properties, on laboratory samples and on real models (violins).

The operational objectives of the project were achieved through applied experimental investigations with high-performance equipment, with the interdisciplinary research team (earth sciences-forestry, chemistry and materials science, engineering sciences, humanities and art (music), ensuring the transfer of knowledge from experienced researchers to young ones.

 

Objectives

The project ”Qualitative, dynamic and acoustic analysis of anisotropic systems with modified interfaces” (ACADIA) aims to explore the mechanical, dynamic and acoustic properties of wood from the construction of stringed musical instruments, both as anisotropic systems with different interfaces due to the structure, texture and design of the wood (spruce and maple), as well as multibody systems whose complex geometry give the musical instrument its special acoustic qualities.

The aim of the ACADIA project is to study the dynamic and acoustic properties of resonant wood from the Carpathian mountains area, modified by three types of treatments: artificial aging (exposure to UV radiation); filling the pores with saline solution and applying two types of finishes (based on natural resins and nitrocellulose resins, according to what is used in the musical instrument factory).

Objectives:

 O1. Microscopic and spectroscopic (FTIR) investigation on the penetration and distribution of treatment materials into wood

O2. Determination of elastic/acoustic properties of wood samples with different surface treatments

O3. Evaluation of dynamic and acoustic properties of wood and violins from unmodified and modified biointerfaces

O4.  The dissemination and visibility of tje project results

 

Phases

Phase I/2022 (02.06.2022 - 31.12.2022)

Microscopic and spectroscopic (FTIR) investigation on the penetration and distribution of treatment materials into wood

Act 1.1 - Preparation of samples (both control and treatment samples) for all test types

        

Act 1.2 - Identification and establishment of anatomical models and physical properties of wood species: spruce and maple

 

Act 1.3 - Exposure of wood samples to UV radiation and control of mass, dimensions and physical characteristics

   

Act 1.4 - Exposure of wood samples to the saline environment and control of mass, dimensions and physical characteristics

 

Act 1.5 - Application of varnish on anisotropic interfaces

Act. 1.6. Progressive analyzing the surface modification and chemical components using microscopic and spectroscopic (FTIR)

 

Act. 1.7 - Dissemination and promotion of project results

  

Phase II/2023 (01.01.2023 - 31.12.2023)

Determination of elastic/acoustic properties of wood samples with different surface treatments

 Act. 2.1. Determination of mechanical properties of samples subjected to tensile 

 Tensile test of maple woodSamples

Act. 2.2. Determination of elastic properties of samples subjected to dynamic mechanical analysis (DMA)

DMA                 DMA molid LS

Act. 2.3. Determination of ultrasonic longitudinal / transverse wave propagation velocity in wood specimens 

US principiu  US anizotropie

Anizotripe UV

Act. 2.4. Elaboration of critical analysis of elastic properties of resonance wood in correlation with microscopic and spectroscopic analysis

WinCell molid paltin

 Act. 2.5 - Dissemination and promotion of project results

 workshop 26 iunie   workshop nov

                            Workshop 23 June 2023                                                                                       Workshop 17 November 2023

Act. 2.6. Progressive analyzing the surface modification and chemical components using microscopic and spectroscopic (FTIR)

Unghi contact

FTIR

 

 Phase III/2024 (01.01.2024 - 31.12.2024)

Evaluation of dynamic and acoustic properties of wood and violins from unmodified and modified biointerfaces

Act. 3.1. Realization of violin plates 

Picture1 eng


Act. 3.2. Exposure of violin plates to the optimum surface treatment

Picture 3


Act. 3.3. Realization of violins as multibody complex systems 

Picture 4 eng
Act. 3.4.  Acoustical measurements of violins in anechoic chamber with high tech equipment 

Foto 126DSC 1633


Act. 3.5. Time and frequencies analysis of all types of violin (control and treated)

Picture 5 eng


Act. 3.6. Testing prototype violins by violinists in order to establish the acoustic quality. 

Survey Acoustic Analysis of Unvarnished/Varnished Violins (Part I) 27 respondents (as of 10/31/2024)

https://docs.google.com/forms/d/e/1FAIpQLSeKxwI_TkOvwnLsJnpQtWQj_1_wmtali8x6rahjdyHN9evHWQ/viewform?usp=sf_link

Survey Acoustic Analysis of Unvarnished/Varnished Violins (Part II) 18 respondents (as of 10/31/2024)

https://docs.google.com/forms/d/e/1FAIpQLSfYCNjKC477kcB8tQ6xQ09GjHvQBybN94suEVcI_ayRU-78EQ/viewform?usp=sf_link

Survey Acoustic Analysis of Violins unvarnished/varnished (part III) 14 respondents (as of 31.10.2024)

https://docs.google.com/forms/d/e/1FAIpQLSfzaSoQIoMcYL_9ow2zMlkVvwiq9tRiVmXLJoALxaUcO8neMQ/viewform?usp=sf_link

Survey Acoustic Analysis of Unvarnished/Varnished Violins (part IV) 7 respondents (as of 31.10.2024)

https://docs.google.com/forms/d/e/1FAIpQLScCCyx_ORvGhH2NE1CKOAxxddxBn_DBMrL0JRP-DgXpCYdGLQ/viewform?usp=sf_link


 Act. 3.7. The dissemination and visibility of results

025 026

 Act. 3.8. Elaboration of a monography published in international print house

Act. 3.9.  Elaboration of patent proposal

Project stages
Phase I/2022 
Microscopic and spectroscopic (FTIR) investigation on the penetration and distribution of treatment materials into wood
Act 1.1 Sample preparation (both control and treatment samples) for all test types

                  

Act 1.2 - Identification and establishment of anatomical models and physical properties of wood species: spruce and maple 

 

 
Act 1.3 - Exposure of wood samples to UV radiation and control of mass, dimensions and physical characteristics
   
 
Act 1.4 - Exposure of wood samples to the saline environment and control of mass, dimensions and physical characteristics
 
 
Act 1.5 - Application of varnish on anisotropic interfaces