Inlämning av Examensarbete / Submission of Thesis

Johan Fredin BTH-AMT-EX--2005/D-10--SE, pp. 62. TEK/avd. för maskinteknik, 2005.

The work

Författare / Author: Johan Fredin
Titel / Title: Speaker that uses the non-linearity in air to create sound
Abstrakt Abstract:

The aim of this work was to investigate theoretically and experimentally the fact that it is possible to create sound by using the nonlinearity in air. A speaker was built verifying the theory that if at least two high frequencies at high amplitude is propagating through a nonlinear medium, for example air, the difference frequency of these two is created in mid air. Measurements and simulations were performed on what the pressure distribution from a ultrasonic transducer looks like.

Ämnesord / Subject: Maskinteknik - Mechanical Engineering\General

Nyckelord / Keywords: Parametric loudspeaker, Difference frequency generation, Biharmonic boundary condition, Nonlinear acoustics

Publication info

Dokument id / Document id:
Program:/ Programme Masters programme in Mechanical Engineering, 60 points
Registreringsdatum / Date of registration: 05/10/2005
Uppsatstyp / Type of thesis: D-Uppsats/Magister/Master


Handledare / Supervisor: Claes Hedberg
Examinator / Examiner: Ansel Berghuvud
Organisation / Organisation: Blekinge Institute of Technology
Institution / School: TEK/avd. för maskinteknik
S-371 41 Karlskrona
+46 455 38 50 00

Files & Access

Bifogad uppsats fil(er) / Files attached: bth_amt_ex_2005d10_se.pdf (1422 kB, öppnas i nytt fönster)