Sökning: "NIHL"

Hittade 3 avhandlingar innehållade ordet NIHL.

  1. 1. Development of analytical methods for the determination of the small molecule component of complex biological systems

    Författare :Kristian Pirttilä; Mikael Hedeland; Curt Pettersson; Torbjörn Arvidsson; Thomas Moritz; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; metabolomics; data processing; peak characterization; algorithm; multivariate data analysis; chromatography; sequential columns; HILIC; RPLC; liquid chromatography; mass spectrometry; LC; MS; noise-induced hearing loss; NIHL; guinea pig; perilymph; method development; validation; R; C ; Analytical Pharmaceutical Chemistry; Analytisk farmaceutisk kemi;

    Sammanfattning : The research field of untargeted metabolomics aims to determine the relative abundance of all small metabolites in a biological system in order to find biomarkers or make biological inference with regards to the internal or external stimuli. This is no trivial aim, as the small metabolites are both vast in numbers and extremely diverse in their chemical properties. LÄS MER

  3. 2. Counteracting Acoustic Disturbances in Human Speech Communication

    Författare :Nils Westerlund; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Speech Enhancement; Noise Reduction; Hearing Aids; Adaptive Feedback Control; Ear-Mic; Active Noise Control;

    Sammanfattning : A signal can be said to be any information bearing unit or action carrying a message from a sender to a receiver. This definition covers a vast number of human and non-human actions, ranging from flirtation to satellite communication. This thesis deals with increasing the quality of one of the most ubiquitous human-to-human signals: Speech. LÄS MER

  4. 3. Longitudinal study of the impact on hearing from aging, genetic background and environmental exposures in male twins

    Författare :Renata Bogo; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Male twins; Longitudinal cohort study; Aging; Genetic influences; Hearing loss Tinnitus; Pure–Tone Average; Threshold shift; Prevalence; Incidence proportion; Noise exposure; Job–Exposure Matrix; Occupational work code;

    Sammanfattning : Background: Hearing loss is a process that normally develops over many years, and the ability to hear high–frequency sounds is often reduced first. Age, repeated exposure to loud noise and other risk factors, diseases, medications and injury, can damage the various structures of the ear and interfere with hearing. LÄS MER