1. Speech Recognition
Calculator
ECE 4884 - L02 - Group 8
Alfredo Herrera
John Holmes
Josh Liang
Alex Kee

2. Presentation Overview
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Project Objectives
Project Approach
Design Overview
Market Analysis
Cost Analysis
Current Status
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3. Project Objectives
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Currently a Speech Recognition Calculator
with the following features does not exist:
Hands-free user interaction.
 Ability to perform simple arithmetic.
 Reasonable accuracy.
 Inexpensive cost.
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Our group seeks to create such a Speech
Recognition Calculator.
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4. Project Objectives
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For Who?
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Population with disabilities (limited hearing, vision,
and movement).
Why create this Product?
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Existing products fail to adequately fulfill the needs of
the population with disabilities, hands-free operation.
What is the Cost?
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~$200 final sale price.
~$100 to manufacture.
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5. Project Approach
Hardware
Arduino
Software
User
Arrows denote flow of data
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6. Design Overview
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7. Hardware Design: Flowchart
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8. Design Overview
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Hardware:
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HM2007 interfaced with Arduino
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Read 8 bits
Software: C and Java
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Arduino
Programmed with C
 Java acts as GUI
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9. Design Overview
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10. Software Design: Code Flowchart
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11. Software Design: Processing Flow
Serial.read()
GUI Display
Serial.clear()
Serial.clear()
Y
Delimiter?
Serial.read()
N
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12. Market Analysis
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Designed for the disabled.
Existing voice recognition calculators on the
market fail to combine the following
features:
Hands-free user interaction.
 Ability to perform simple arithmetic.
 Reasonable accuracy.
 Inexpensive cost.

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13. Cost Analysis
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14. Cost Analysis
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15. Cost Analysis
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16. Cost Analysis
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17. Current Status: Objectives Met
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Completely Hands Free
Cost is around $230
Recognizes Numbers, Operators, and
Words
Accuracy within 70%
Remote Connection Capability
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18. Current Status: Problems
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Speaker Independence:
Accents
 Tone
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Accuracy:
Four
 Six
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Software:
Arithmetic Solution
 Java to C Interfacing Solution
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19. Questions?
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