Research: separate and document vowel trimming

[William Entriken]

In SpeechAnalyzer.m there are several simple methods related to finding the relevant vowel sound in the utterance:

• - (NSRange)vowelRange is the main method and it depends on the following two
• - (NSRange)strongSignalRange
• - (NSRange)truncateRangeTails:(NSRange)range

This is already implemented in off_line_tail_clipping WE2012-02-09.m

To prove this out, we must:

• Rerun the Matlab program
• Document how to run the Matlab program and expected outputs (make a README.md)
• Rename the files so people can find them
• Create a XCTest in iOS to perform the same action using the app
• Set the XCTest to expect the same values as output from Matlab
• Cross fingers and run it