Prototypmetoder för hornhögtalare
(2022) MMKM05 20221Innovation
- Abstract
- The aim of this project was to investigate suitable prototyping methods to be used during the development of horn loudspeakers. Different methods were tested to investigate how well they replicated the original loudspeaker based on acoustical performance. The methods were also evaluated based on other requirements such as cost, manufacturing process and ability to handle complexes shapes.
The method Double Diamond was used to find and evaluate suitable prototyping methods. Two loudspeakers were chosen as references for the prototypes to replicate, one made of plastic and one made of metal. The reason was to investigate if the methods were applicable for loudspeakers made of different materials. Both handmade and additive manufactured... (More) - The aim of this project was to investigate suitable prototyping methods to be used during the development of horn loudspeakers. Different methods were tested to investigate how well they replicated the original loudspeaker based on acoustical performance. The methods were also evaluated based on other requirements such as cost, manufacturing process and ability to handle complexes shapes.
The method Double Diamond was used to find and evaluate suitable prototyping methods. Two loudspeakers were chosen as references for the prototypes to replicate, one made of plastic and one made of metal. The reason was to investigate if the methods were applicable for loudspeakers made of different materials. Both handmade and additive manufactured prototypes were tested for the horn parts of the loudspeakers. Several surface treatments were also investigated for the different prototypes. In addition to testing prototyping methods for the horn parts, two prototyping methods for the driver mounts of the loudspeakers were tested. The acoustical performance of the prototypes was measured in an echo-free chamber. The frequency response, distortion and directivity of the prototypes were analyzed and compared with the reference loudspeakers. A listening test was also performed for all prototypes.
The handmade prototypes were shown to not replicate the reference loudspeaker and were therefore considered not suitable as prototyping methods. The additive manufactured prototypes replicated the reference loudspeaker made of plastic well. For the loudspeaker made of metal, more differences between the methods were shown. The additive manufactured prototypes did not replicate the reference loudspeaker made of metal as good as they replicated the loudspeaker made of plastic. Surface treatment with metal lacquer showed an improvement for the prototypes of the reference loudspeaker made of metal. For other tested surface treatments, no improvements were shown. To build prototypes of horn loudspeakers made of plastic, FDM in PLA is recommended as prototyping method. To build prototypes of horn loudspeakers made of metal, further research on prototyping methods is recommended. Among the tested methods it was shown that FDM in PA with carbon fiber, surface treated with metal lacquer, is the most suitable method. For the driver mounts of the loudspeakers, MJP was found to be the most suitable method among the tested but further research is recommended to find a more suitable method. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9085653
- author
- Andersson, Linn LU and Nivestam, Alice LU
- supervisor
-
- Damien Motte LU
- organization
- course
- MMKM05 20221
- year
- 2022
- type
- H2 - Master's Degree (Two Years)
- subject
- keywords
- prototyping, additive manufacturing, horn loudspeakers, acoustics, mechanical engineering
- language
- Swedish
- id
- 9085653
- date added to LUP
- 2022-06-09 13:42:59
- date last changed
- 2022-06-09 13:42:59
@misc{9085653,
abstract = {{The aim of this project was to investigate suitable prototyping methods to be used during the development of horn loudspeakers. Different methods were tested to investigate how well they replicated the original loudspeaker based on acoustical performance. The methods were also evaluated based on other requirements such as cost, manufacturing process and ability to handle complexes shapes.
The method Double Diamond was used to find and evaluate suitable prototyping methods. Two loudspeakers were chosen as references for the prototypes to replicate, one made of plastic and one made of metal. The reason was to investigate if the methods were applicable for loudspeakers made of different materials. Both handmade and additive manufactured prototypes were tested for the horn parts of the loudspeakers. Several surface treatments were also investigated for the different prototypes. In addition to testing prototyping methods for the horn parts, two prototyping methods for the driver mounts of the loudspeakers were tested. The acoustical performance of the prototypes was measured in an echo-free chamber. The frequency response, distortion and directivity of the prototypes were analyzed and compared with the reference loudspeakers. A listening test was also performed for all prototypes.
The handmade prototypes were shown to not replicate the reference loudspeaker and were therefore considered not suitable as prototyping methods. The additive manufactured prototypes replicated the reference loudspeaker made of plastic well. For the loudspeaker made of metal, more differences between the methods were shown. The additive manufactured prototypes did not replicate the reference loudspeaker made of metal as good as they replicated the loudspeaker made of plastic. Surface treatment with metal lacquer showed an improvement for the prototypes of the reference loudspeaker made of metal. For other tested surface treatments, no improvements were shown. To build prototypes of horn loudspeakers made of plastic, FDM in PLA is recommended as prototyping method. To build prototypes of horn loudspeakers made of metal, further research on prototyping methods is recommended. Among the tested methods it was shown that FDM in PA with carbon fiber, surface treated with metal lacquer, is the most suitable method. For the driver mounts of the loudspeakers, MJP was found to be the most suitable method among the tested but further research is recommended to find a more suitable method.}},
author = {{Andersson, Linn and Nivestam, Alice}},
language = {{swe}},
note = {{Student Paper}},
title = {{Prototypmetoder för hornhögtalare}},
year = {{2022}},
}