1. Beethoven’s Ear Safety Analysis
Nick Kwolek Martin Pendergast
Stephen Edwards David Duemler

2. Outline Project Overview Block Diagram
Project Specific Success Criteria
Environmental Analysis
Ethical Analysis

3. Project Overview A music composition and instruction tool
Records audio of a musical instrument and creates MIDI sheet music of the audio
Files transferred via SD card

5. Project-Specific Success Criteria
An ability to sample an audio signal with appropriate input filtering.
An ability to transform an audio signal to the frequency domain in finite length sample windows.
An ability to determine the note names and durations based on the frequency spectrum and an internal metronome.
An ability to generate a musical score stored in a MIDI file, based on the analyzed data.
An ability to transfer the completed music file to a removable storage medium.

6. Manufacturing Impact PCB Fabrication Board Assembly Packaging Assembly
Only 1 part, the audio amplifier, is non-RoHS compliant
Packaging Assembly

7. Normal Use Impact
Product is expected to last 38 years (from Reliability Assessment)
Energy Consumed
Product has no passive components that would operate in an off or standby state
High power consumption estimations end up at ~1.5 W
Mainly dsPIC (High Temp/Power estimates at ~.81W)
Analog front end (estimated at ~.6W)

8. Disposability Concerns
Relatively easy to dispose of, only possible hazardous component is LCD
Packaging
Normal disposal
PCB, Components, LCD
Local PCB/Component recycling companies.
LCD sent off to specific recycling company.

9. Testing Procedures
Testing under a variety of operating schemes is important due to device portability.
Different testing schemes
‘Normal’ conditions
Operation in different temperatures/humidity
Do drop/spill tests to ensure high product quality

10. Safety Mechanisms Proper warning label placement Power safety
Safety software
Watchdog for ADC
Watchdog for SD card communication / SD file system

11. User Documentation
Warn user of the failure modes from the safety analysis
Inform user of the different suitable usage conditions (as determined by the testing process).
Inform user of the typical or normal usage conditions.

12. Questions?