Zveza med absorpcijo udarnega zvoka in trdoto lesenih talnih oblog

diplomski projekt

Jernej Smrekar (Author), Željko Gorišek (Reviewer), Aleš Straže (Mentor)

Abstract

Raziskovali smo ali obstaja zveza med emitiranim udarnim zvokom in trdoto lesov in masivnih lesenih talnih oblog. V raziskavi smo proučili preizkušance smrekovega, macesnovega, hrastovega, bukovega ter jesenovega lesa, nominalne debeline 20 mm. Trdoto lesa smo določili s standardno Brinellovo metodo, ter z dinamično metodo s spuščanjem jeklene kroglice, pri kateri smo izmerili še akustični odziv. Ugotovili smo naraščanje trdote lesa z večanjem gostote lesnih vrst. Potrdili smo tudi odvisnost velikosti površinske poškodbe lesa pri padcu jeklene kroglice s premerom vtiska kroglice pri standardni Brinellovi metodi. Z večanjem vtiska kroglice pri dinamični metodi smo potrdili nižji izmerjen maksimalni-, eksponentni povprečni- ter povprečni zvočni tlak. Širina frekvenčnega spektra izmerjenega zvočnega signala je bila večja pri mehkejših lesnih vrstah. Rezultati tudi potrjujejo, da so za mirne prostore zaradi manjšega emitiranega udarnega zvoka primernejše lesene talne obloge iz mehkejših lesnih vrst.

Keywords

les;talne obloge;trdota;zvok;

Data

Language:	Slovenian
Year of publishing:	2016
Typology:	2.11 - Undergraduate Thesis
Organization:	UL BF - Biotechnical Faculty
Publisher:	[J. Smrekar]
UDC:	684.77-35.3
COBISS:	2623625
Views:	333
Downloads:	78
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Relationship between the impact noise absorption and hardness of wood flooring
Secondary abstract:	We investigated whether there is a relationship between the emitted sound impact and hardness of woods and solid wood flooring. In this study we examined test pieces of spruce, larch, oak, beech and ash wood, the nominal thickness of 20 mm. Hardness of wood was determined by standard Brinell method and by dynamic method using dropping of the steel ball, in which the acoustic response was measured. We have found increase of the wood hardness by increasing the density of the wood species. We have confirmed also the correlation of the size of wood surface damage at the dynamic method measurement with the indentation diameter at the standard Brinell method. By increasing of surface damage at the fall of steel ball the decrease of measured maximal-, exponential average- and the average sound pressure level was confirmed. The frequency range of the measured sound spectrum was greater at soft wood species. The results suggest using of soft wood species for silent spaces to decrease the emitted impact noise.
Secondary keywords:	wood;wood flooring;hardness;sound;
Type (COBISS):	Diploma project paper
Thesis comment:	Univ. v Ljubljani, Biotehniška fak., Oddelek za lesarstvo
Pages:	IX, 33 f.
ID:	11920738