Sökning: "acoustic evaluation"

Visar resultat 26 - 30 av 69 avhandlingar innehållade orden acoustic evaluation.

  1. 26. Acoustic, perceptual and physiological studies of ten-year-old children's voices

    Författare :Anita McAllister; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Child voice; hoarseness; perceptual evaluation; voice characteristics; visual analog scales; voice range profiles; fundamental frequency range; dynamic range; glottal closure; stroboscopy; vocal nodules; register transitions; subglottal pressure; SPL;

    Sammanfattning : The aim of the present investigation was to study hoarseness and its perceptual, acoustic and physiological characteristics in ten-year-old children's voices. Fifty-eight children's voices were perceptually evaluated along 15 voice parameters. LÄS MER

  3. 27. Distributions Of Fiber Characteristics As A Tool To Evaluate Mechanical Pulps

    Författare :Sofia Reyier Österling; Per Engstrand; Hans Höglund; Olof Ferritsius; Rita Ferritsius; Hans Ersson; Per Gradin; Mittuniversitetet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fiber; fibre; fiber characteristics; fiber dimension; fiber properties; mechanical pulp; FiberLab; raw data; distribution; fiber wall thickness; BIN; bonding ability influence; bonding indicator; bonding ability; fiber width; fibrillation; collapse resistance; laboratory sheet; fiber analyzer; optical analyzer; TMP; CTMP; SGW; sheet model; prediction; fiber characterization; hydrocyclone; fractionation; kernel density estimation; KDE; diffusion mixing; acoustic emission; F0.90; Norway spruce; Picea abies;

    Sammanfattning : Mechanical pulps are used in paper products such as magazine or news grade printing papers or paperboard. Mechanical pulping gives a high yield; nearly everything in the tree except the bark is used in the paper. This means that mechanical pulping consumes much less wood than chemical pulping, especially to produce a unit area of printing surface. LÄS MER

  4. 28. Evaluation of surgically assisted rapid maxillary expansion and orthodontic treatment : Effects on dental, skeletal and nasal structures and rhinological findings

    Författare :Anders Magnusson; Agneta Marcusson; Krister Bjerklin; Peter Nilsson; Torbjörn Ledin; Maria Ransjö; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : Surgically Assisted Rapid Maxillary Expansion (SARME) is frequently used to treat skeletal maxillary transverse deficiency (MTD) in skeletally mature and non-growing individuals. Despite previous research in the field, questions remain with respect to the long-term stability of SARME and its effects on hard and soft tissue. LÄS MER

  5. 29. Experimental and multivariate analysis methods for sound quality evaluation of diesel engines

    Författare :Örjan Johansson; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk akustik; Engineering Acoustics;

    Sammanfattning : Noise control and sound quality analysis are important, since noise has been registered to be a predominant factor in stress and a source of great annoyance. Traffic noise is a problem and a major part of this noise comes from heavy vehicles. LÄS MER

  7. 30. Molecular Adsorption on Self Assembled Monolayers studied by Surface Acoustic Waves and Infrared Spectroscopy

    Författare :Lars Bertilsson; Antonio J. Ricco; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Chemical sensors based on the selective absorption of gas/vapors in polymer layers rely on molecular interactions. Details of the mechanisms involved can be obtained by studying the adsorption on well defined model organic surfaces. LÄS MER