Search for dissertations about: "earplugs"

Found 2 swedish dissertations containing the word earplugs.

  1. 1. Acoustical properties of earplugs

    University dissertation from Engineering Acoustics, LTH, Lund University

    Author : Per Hiselius; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinteknik; hydraulik; vakuumteknik; vibrationer; akustik; vibration and acoustic engineering; vacuum technology; hydraulics; Mechanical engineering; acoustic modelling; objective measurement; insertion loss; earplugs; HPE; HPD; hearing protectors; Two-Port; Four-Pole; attenuation; electro acoustics; acoustics;

    Abstract : In this study an experimental setup for measurements of high impedance objects in ducts, yielding the acoustical Two-Port properties of the object, is applied to earplugs. A frequently used experimental setup for measuring objective acoustical properties of earplugs is that of artificial ears. Great effort is spent on duplicating the human ear. READ MORE

  2. 2. Bone conducted sound transmission for communication systems

    University dissertation from Engineering Acoustics, LTH, Lund University

    Author : Sabine Reinfeldt; [2006]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; bone conduction; sound field hearing; occlusion effect; transcranial transmission; communication system; bone conduction microphone; hearing protection devices; hearing;

    Abstract : Bone conducted (BC) sound is vibrations in the skull bone that are transmitted to the cochlea and perceived as sound, originating from a sound field or a vibration transducer. This transmission path can be advantageous for communication systems in some situations, e.g. READ MORE