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Sound Level Measurement System
Linköping University, Department of Electrical Engineering.
2006 (English)Independent thesis Basic level (professional degree), 20 points / 30 hpStudent thesis
Abstract [en]

The purpose of this master thesis work is to design a device that measures the loudness of sound for different frequencies. This device is divided in three parts; a microphone that captures the sound, one A/D converter that samples the sound and one FPGA which analyse the data using an FFT algorithm.

LEDs connected to the FPGA are used to indicate different output levels. A db(A) filter is applied that weights each frequency, before the different outputlevels are measured for each frequency.

This system is supposed to be a subsystem to a larger system that is developed in a company. However, because of the risk that competitors might be able to guess the next product move of the company, the company is anonymous in this report. All the components used are paid for by the company and in return the company gets an idea of the complexity of the system and a basis for future design decisions.

Place, publisher, year, edition, pages
Institutionen för systemteknik , 2006. , 45 p.
Keyword [en]
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:liu:diva-7924ISRN: LiTH-ISY-EX--06/3964--SEOAI: diva2:22832
2006-11-06, Systemet, B-huset, Universitetet, Linköping, 13:00
Available from: 2006-12-14 Created: 2006-12-14

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