Removed context.createOscilator().connect(context.destination) in init()
Rename function name
Implement connect OscillatorNode to AudioContext.destination
Add sound play and stop button
Add a play sound flag
Implement play and stop sound
Change instantiate AudioContext timing, and add a argument frequency in init function
Implement init function

- create sound
- set frequency
- output sound
Remove a argument functions
Remove return HearingTest
Move script source in head element to before body element end tag
Rename argument window to exports
Remove hearingTest.init() call
Add exports.app
Add new option a sound
Add frequency setting
なぜか競合したのでmerge