Essays about: "acoustic impedance"

Showing result 1 - 5 of 23 essays containing the words acoustic impedance.

1. 1. Speckle suppression in ultrasound images of heterogeneous materials

   University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

   Author : Simon Johnsson; [2023]
   Keywords : Ultrasound; non-destructive testing; wiener filter; signal processing;

   Abstract : Performing non-destructive testing (NDT) on materials is a helpful tool for maintenance and quality control because the materials are not destroyed or disturbed; ultrasound imaging is one type of NDT. Ultrasound imaging of heterogeneous materials contains many echoes from the material itself. READ MORE

3. 2. Towards a tunable, wide-band acoustic transducer operating in the quantum regime.

   University essay from KTH/Tillämpad fysik

   Author : Abel Hugot; [2022]
   Keywords : Hybrid quantum systems; Acoustics; Impedance matching; SQUIDs; Hybrida kvantsystem; Akustik; Impedansanpassning; SQUIDs.;

   Abstract : In the past decade we have seen fast development of new quantum technologies that promise to revolutionise communications and computing. Many different routes are explored to physically implement such quantum technologies. Among others, we can mention superconducting circuits, spin-based devices and photonic devices. READ MORE

4. 3. Accuracy verification of GT-Power model and reduction of computational time

   University essay from KTH/Marcus Wallenberg Laboratoriet MWL

   Author : Viktor Dahl; Maja Dyrsmeds; [2022]
   Keywords : Vehicle acoustics; GT-Power; Exhaust system; Internal combustion engine;

   Abstract : The noise produced by any new vehicles is tightly regulated by the European Union which have developed a standardised method for measuring the emitted noise of new vehicles. The method involves a vehicle driving past carefully positioned microphones at a specific range of engine speeds. READ MORE

5. 4. Acoustic properties of a 5G Telecom Equipment Shroud Design for Noise suppression

   University essay from KTH/Marcus Wallenberg Laboratoriet MWL

   Author : David Andersson; [2021]
   Keywords : Acoustics; 5G; Shroud; Telecom; Noise reduction; Akustik; 5G; Kåpa; Teleutrustning; Ljudisolering;

   Abstract : As technology moves forward it has a tendency to consume more and more power that needs to be cooled by bigger and louder fans, this is especially true for the new generation of 5G radio equipment. This Master thesis is a collaboration with Ericsson and attempts to construct a shroud for containing a number of 5G radio units whilst attenuating the fan noise of the units as effectively as possible. READ MORE

6. 5. Evaluation of OSTE-hybrid materials for acoustophoresis applications

   University essay from KTH/Medicinteknik och hälsosystem

   Author : Elin Forss; [2020]
   Keywords : Acoustophoresis; off-stoichiometry-thiol-enes; OSTE; microfluidics;

   Abstract : This project aimed at exploring new hybrid materials to be used for acoustophoresis applications. Acoustophoresis can be used to manipulate particles inside a microfluidic channel by creating ultrasound standing waves within the channel [1]. This can be used for cell separation [2] or trapping of particles [3]. READ MORE