Audio System Measurement and Improvement Advisor Jaijeet Roychowdhury TeamMohamud Ismail Franklin...
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Transcript of Audio System Measurement and Improvement Advisor Jaijeet Roychowdhury TeamMohamud Ismail Franklin...
Audio System Measurement and ImprovementAdvisor Jaijeet Roychowdhury
Team Mohamud IsmailFranklin WongAndrew JohnsonGarett Kauer
Purpose
http://www.techexcess.net/images/products/Dell/dell-a225.jpg
http://www.theage.com.au/ffximage/bose_wideweb__470x367,2.jpg
Turn Cheap Dell A225 PC Speakers
Into speakers comparable to much more expensive speakers with an easy to use device that has a low consumer cost
Purpose
http://www.carstereohelp.com/images/PontiacStrMonsoon06280201.jpg
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0Frequency Response of Speakers
frequency (Hz)
dB
Solution
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Frequency Response of white noise
frequency (Hz)
dB
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Frequency Response of Speakers
frequency (Hz)
dB
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Frequency Response of Microphone
frequency (Hz)
dB
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Frequency Response of Room
frequency (Hz)
dB
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Frequency Response of Entire System
frequency (Hz)
dB
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Entire System after precoding
frequency (Hz)
dB
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Frequency Response of Entire System
frequency (Hz)
dB
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Entire System after precoding
frequency (Hz)
dB
Specifications / Requirements
All software used must be open source/zero cost All software used must be Linux compatible Resulting source should be distributed as open-
source Final deliverable must have an easy to use UI Resultant H(s) should be flat to within 5dB over
100Hz-10kHz
Budget
Quantity Item Price
1 PC with Speakers (provided) $0.00
1 Shure PG58 microphone $69.95
Total $69.95
Timeline
Task Name Start Finish
Audio Enhancement Device 1/28/2008 5/13/2008get linux box up and running 1/28/2008 2/15/2008find and purchase microphone 1/28/2008 2/22/2008link microphone and PC 2/25/2008 2/29/2008implement Xfer Fn finder/invertor 3/3/2008 3/7/2008link transfer function to ALSA 3/10/2008 3/14/2008test 3/17/2008 3/28/2008create user friendly UI 3/31/2008 4/11/2008prepare final prototype 4/14/2008 4/25/2008buffer 4/28/2008 5/13/2008
E B M E B M E B M E B M EJanuary February March April May
Conclusion
Software development will be open source, created to operate using a Linux system. Project software will comprise two separate systems. The first will be used to measure the audio response within a room by interfacing with a microphone. The second system will be used to correct the speaker output to adjust for linear non-idealities produced by the audio system and room acoustics.
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