Sökning: "Microphone port"
Hittade 4 uppsatser innehållade orden Microphone port.
1. Acoustic Characterization of Catalyst
Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)Sammanfattning : The WHO has set a sound level threshold of 55 dB, beyond which noise is considered harmful to humans when exposed for an extended period of time. It is, however, estimated by the European Environmental Agency that over 110 million people in the EU are regularly exposed to levels of traffic noise above 55 dB. LÄS MER
2. Mechanical Design Solutions for Wind Resistant Microphone Ports
Master-uppsats, Lunds universitet/InnovationSammanfattning : This project’s objective was to gather knowledge of ways to mechanically increase speech intelligibility and decrease wind noise through the design of microphone ports. The project focused on ports that would be applied in outdoor intercom products. LÄS MER
3. Designing, building and validating a test rig to measure two-port data of small fans
Master-uppsats, KTH/MWL Marcus Wallenberg LaboratorietSammanfattning : There is a great need in the industry for measurement methods to characterize acoustic sources in ducts. One way to obtain a complete description of a source is to measure 2-port data, comprising of the source scattering matrix and the source vector. The resulting model can then be used to predict the source properties, e.g. LÄS MER
4. Investigation og Nonlinear Acoustical Properties of Perforated Plate Samples and Samples of Aircraft Engine Liners
Master-uppsats, KTH/Farkost och flygSammanfattning : Five samples, three perforated plates and two more realistic samples used in aircraft engine liners have been investigated. All the samples when exposed to high amplitude sound waves show nonlinear acoustic behavior which depends on acoustic velocity at the plate position. LÄS MER