Sökning: "Acoustical measurements"

Visar resultat 6 - 10 av 20 avhandlingar innehållade orden Acoustical measurements.

1. 6. Bone conducted sound transmission for communication systems

   Författare :Sabine Reinfeldt; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; bone conduction; sound field hearing; occlusion effect; transcranial transmission; communication system; bone conduction microphone; hearing protection devices; hearing;

   Sammanfattning : 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. LÄS MER

3. 7. Nano-Engineered Contrast Agents : Toward Multimodal Imaging and Acoustophoresis

   Författare :Satya V.V.N. Kothapalli; Dmitry Grishenkov; Lars-Åke Brodin; Andreas Michael Versluis; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Nano-engineered microbubbles; SPION nanoparticles; Acoustic characterization of MBs; Fracturing mechanism of MBs; Opto-acoustics; Acoustophoresis; Physics; Fysik; Järnvägsgruppen - Ljud och vibrationer; Järnvägsgruppen - Ljud och vibrationer; Teknik och hälsa; Technology and Health;

   Sammanfattning : Diagnostic ultrasound (US) is safer, quicker and cheaper than other diagnostic imaging modalities. Over the past two decades, the applications of US imaging has been widened due to the development of injectable, compressible and encapsulated microbubbles (MBs) that provide an opportunity to improve conventional echocardiographic imaging, blood flow assessment and molecular imaging. LÄS MER

4. 8. A Combined Perceptual and Acoustical Account of US Dialect Distance

   Författare :Clelia R. LaMonica; Peter Sundkvist; Cynthia Clopper; Anja Schüppert; Stockholms universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; HUMANIORA; HUMANITIES; US English; dialects; dialectometry; perception; acoustics; sociophonetics; English; engelska;

   Sammanfattning : This study examines the influence of attitudinal, perceptual, and acoustic factors on the categorization of US dialects by comparing acoustic-vocalic and perceived accent distances. The results of native and non-native listeners’ perceived distances between US regional accents are investigated in light of how acoustic-phonetic markers, attitudinal judgments, and identifiability may together impact how similar or different accents are perceived to be. LÄS MER

5. 9. The layer that did not swim away : Broadband acoustic discrimination and characterization of ocean stratification

   Författare :Elizabeth Reed-Weidner; Martin Jakobsson; Richard Hobbs; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Acoustical Oceanography; acoustics; oceanography; stratification; remote sensing; maringeologi; Marine Geology;

   Sammanfattning : Ocean stratification plays a critical role in many oceanographic processes. The magnitude of mixing between stable water masses is regulated, in part, by the intensity of stratification. LÄS MER

7. 10. Acoustic Characterization of Turbochargers and Pipe Terminations

   Författare :Heiki Tiikoja; Mats Åbom; Francisco Denia; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; acoustical two-port; turbocharger; transmission loss; sound generation; compressor; turbine; IC-engine; inlet system; exhaust system; flow duct; duct termination; reflection coefficient;

   Sammanfattning : In search for quieter engines there is a need for a better understanding of the acoustic properties of engine intake and exhaust system components. Besides mufflers which have the purpose of reducing pressure pulses originating from the internal combustion (IC) engine, there are many components in a modern car exhaust and intake system, e.g. LÄS MER