Search for dissertations about: "sound technology"

Showing result 11 - 15 of 508 swedish dissertations containing the words sound technology.

2. 11. Sound Insulation at Low Frequencies

   Author : Andrzej Pietrzyk; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Finite Element Method; numerical simulations; Modal Approach; sound insulation; sound reduction index; low frequency; building partitions;

   Abstract : The airborne sound transmission through building partitions at low frequencies was studied. The definition of the sound reduction index as a measure of sound insulation has been examined by means of extensive numerical simulations in 3-D domains. The simulations were based on the wave theoretical acoustics. READ MORE

4. 12. Sound propagation from sustainable ground vehicles : from aeroacoustic sources to urban noise

   Author : Nicolas Pignier; Ciarán O'Reilly; Susann Boij; Gwenael Gabard; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sound propagation; sound generation; ground vehicle; aeroacoustics; aerodynamics; Kirchhoff approximation; detached eddy simulation; Ffowcs Williams and Hawkings; ljudutberdning; ljudalstring; markfordon; aeroakustik; aerodynamik; Kirchhoff approximation; detached eddy simulation; Ffowcs Williams and Hawkings; Vehicle and Maritime Engineering; Farkostteknik; Engineering Mechanics; Teknisk mekanik;

   Abstract : Transportation is the main source of environmental noise in Europe, with an estimated 125 million people affected by excessive noise levels from road traffic, causing a burden of noise related diseases and having a substantial economic impact on society. In order to reduce exposure to high levels of traffic noise, two approaches are the topic of extensive research: preventing sound from propagating from roads and railways using for example noise barriers, and reducing the sources of noise themselves. READ MORE

5. 13. Sensing the environment : development of monitoring aids for persons with profound deafness or deafblindness

   Author : Parivash Ranjbar; Dag Stranneby; Erik Borg; Charlotte M. Reed; Örebro universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Auditive identification; Deaf; Deafblind; Directional perception; Environmental sound; Filtering; Frequency transposing; Hearing aid; Hearing impairment; Modulating; Monitoring; Tactile perception; Vibratory aid; Vibratory identification; Electronics; Elektronik; TECHNOLOGY; TEKNIKVETENSKAP; Elektronik; Electronics;

   Abstract : Earlier studies of persons with deafness (D) and/or deafblindness (DB) have primarily focused on the mobility and communication problems. The purpose of the present study was to develop technology for monitoring aids to improve the ability of persons with D and/or DB to detect, identify, and perceive direction of events that produce sounds in their surroundings. READ MORE

6. 14. SOUND READING : Exploring and conceptualising audiobook practices among young adults

   Author : Elisa Tattersall Wallin; Anna Lundh; Jan Nolin; David Gunnarsson Lorentzen; Högskolan i Borås; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; audiobooks; reading practices; subscription services; apps; practice theory; timespace; transaction logs; interviews; digital methods; young adults; Library and Information Science; Biblioteks- och informationsvetenskap;

   Abstract : Audiobooks and subscription services are becoming increasingly popular in Sweden as well as many other parts of the world. This compilation thesis develops knowledge and conceptualisations of audiobook reading practices in the context of subscription services and apps. READ MORE

7. 15. Processing of the Phonocardiographic Signal : methods for the intelligent stethoscope

   Author : Christer Ahlström; Per Ask; Leif Sörnmo; Linköpings universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Bioacoustics; phonocardiographic; signal processing; heart sound; lung sound; nonlinear dynamics; Medical technology; Medicinsk teknik;

   Abstract : Phonocardiographic signals contain bioacoustic information reflecting the operation of the heart. Normally there are two heart sounds, and additional sounds indicate disease. If a third heart sound is present it could be a sign of heart failure whereas a murmur indicates defective valves or an orifice in the septal wall. READ MORE