Master Thesis - Linearization of a Loudspeaker

Master Thesis - Linearization of a Loudspeaker

Job Description

Category: Signal Processing and Acoustics

Scope: 2 students completing 30 credits (20 weeks) each.

Background

Axis communications have a growing number of products which includes paging systems loudspeakers.

The most common loudspeaker driver design consists of a membrane attached to a coil and the coil is located in a magnetic gap.

When an electric current goes through the coil in the magnetic gap, a force is generated and the coil with the attached membrane moves. These movements generate air pressure variations – Sound.

If the coil movements are small, within the magnetic gap, the movements are linear to the electric input signal, but as the displacement increases the magnetic force is reduced and on top of that, mechanical counter forces increases with displacement, which leads to non-linearities consisting of harmonic distortions.
 

Goal

• Investigate, identify and quantize different sources of loudspeaker nonlinearities.

• Implement and evaluate ways to counter measure the most important types of loudspeaker nonlinearities.

Who are you?

For this thesis proposal we target students with a strong interest in audio, electronics, software and signal processing. Most likely you are studying a master program in electronics engineering or engineering physics.
 

OK, I am interested! What do I do now?
You are valuable to us – how nice that you are interested in one of our proposals! There are a few things for you to keep in mind when applying.

• Applications are accepted in both Swedish and English, and you apply via the proposal advert.
• The announced thesis is open only to students affiliated with a Swedish University/College either directly or via an exchange program.
• When the thesis proposal states that it includes two students working together, we would like you to apply in pairs. In these cases, send one application each but make sure to clearly state in your application who your co-applicant is. If you have any questions regarding this, please do not hesitate to contact us.
• Please attach your CV and University/College grade summary.

Who to contact for any questions regarding the position!
Please contact Eric Liljeblad +46 722 440 017

Type of Employment

Thesis Worker (Fixed Term)

Posting End Date

2025-12-30

Certain roles at Axis require background checks, which means applicable verifications will be done in these recruitments. Notice will be provided before we take any action.

About Axis Communications

We enable a smarter, safer world by creating innovative solutions for improving security and business performance. As a network technology company and industry leader, we offer solutions in video surveillance, access control, intercom, and audio systems, enhanced by intelligent analytics applications.

With around 5000 committed employees in over 50 countries, we collaborate with partners worldwide. Together, we thrive in our friendly, open, and collaborative culture and inspire each other to think beyond the expected. United by our commitment to inclusion, diversity, and sustainability, we consistently seek to develop our skills and way of working.

Let´s create a smarter, safer world

For more information about Axis, please visit our website www.axis.com.

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