Master Thesis - Wave Steepening in a Horn Loaded Loudspeaker

Master Thesis - Wave Steepening in a Horn Loaded Loudspeaker

Job Description

Category: Signal Processing and Acoustics

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

Background

Axis communications has a growing number of products which includes paging systems with horn speakers.

Simplified, a horn speaker is a way of increasing the efficiency of a transducer by improving the acoustic impedance matching.

This is done by feeding the high impedance speaker driver output into a confined space, the throat of the horn, which is also a high impedance.

The expanding area of the horn in front of the speaker works as a slowly decreasing acoustic impedance until the sound waves reaches the open air, which is a low impedance.

This design comes with the drawback that the pressure variations of the sound is large in a small space. And sound speed varies with pressure, so that sound travels faster at higher pressure levels.
 

Goal

• Investigate the wave steepening effect on sound in horn speakers and ways to counter measure this effect.

• Implement and evaluate a way to cancel out the wave steepening effect.

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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