Search for dissertations about: "akustik"

Showing result 1 - 5 of 847 swedish dissertations containing the word akustik.

  1. 1. Variations in sound insulation in lightweight timber constructions

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Rikard Öqvist; Luleå tekniska universitet.; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Building acoustics; Civil engineering and architecture - Building engineering; Byggnadsakustik; Samhällsbyggnadsteknik och arkitektur - Byggnadsteknik; Teknisk akustik; Engineering Acoustics;

    Abstract : This licentiate thesis deals with the topic of variations and uncertainties in building acoustic parameters for lightweight timber constructions. A higher safety margin to the legal requirements is needed to compensate for acoustical uncertainties, which leads to higher costs. READ MORE

  2. 2. Advanced measurement and modelling methods for noise source analysis

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Matti Rantatalo; Luleå tekniska universitet.; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk akustik; Engineering Acoustics;

    Abstract : In daily life sound is a vital dimension for the perception of the world around us but can in some cases be considered as annoying, irritating, or even harmful. In these cases the sound is labelled as noise and can be addressed in two ways, either by insulating the noise problem from the receiver (person) or by altering the source. READ MORE

  3. 3. Assessment and control of tonal components in electric vehicles

    University dissertation from Luleå tekniska universitet

    Author : David Lennström; Luleå tekniska universitet.; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk akustik; Engineering Acoustics;

    Abstract : New challenges arise for noise, vibration and harshness (NVH) engineers when electric motors are introduced into cars traditionally powered by internal combustion engines (ICE). The noise signature from an electric traction motor is characterized by speed-dependent high frequency tonal components due to electro-magnetic excitation. READ MORE

  4. 4. Study and modelling of lightweight floor structure regarding its acoustic properties

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Mohammad Sazzad Mosharrof; Luleå tekniska universitet.; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Building acoustics; Civil engineering and architecture - Building engineering; Byggnadsakustik; Samhällsbyggnadsteknik och arkitektur - Byggnadsteknik; Teknisk akustik; Engineering Acoustics;

    Abstract : Lightweight floor structure is widely used in building industries and to have better sound insulation builders come up with different ways of construction. Depending on the construction the floor structure could either be coupled (floor and ceiling coupled by beams) or decoupled (no mechanical connection between floor and ceiling). READ MORE

  5. 5. Communication acoustics in classroom environments on the use of assistive listening devices

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Johan Odelius; Luleå tekniska universitet.; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk akustik; Engineering Acoustics;

    Abstract : Assistive listening devices (ALDs) are used in classrooms to assist communication for students with hearing loss. An ALD, a system of external microphones, transmits sound directly to the students' hearing aids. The signal is coupled to the hearing aid using a radio frequency (FM) or an induction loop (IL) system. READ MORE