Epson Moverio Pro BT-2000, Developer'S Manual

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MOVERIO Pro Developer's Guide (Rev.1.4)
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5.7. Others
5.7.1. Timing for reflecting the setting for the voice recognition start conditions
When audio input recognition switches from disabled to enabled, the voice recognition start
conditions are reflected in the system.
Therefore, if you change the recognition start conditions when audio input is enabled, once call
IVoiceCommandInterface.stop(), disable audio input and call IVoiceCommandInterface.setSnr() to
set the voice recognition starting condition. After IVoiceCommandInterface.start() is called,
setting is then reflected by the system.
5.7.2. Recommended value of voice recognition starting condition
When recognition errors occur often due to noise of using environment, recognition errors can be
reduced by changing the voice recognition starting condition according to the noisiness（noise
level）.
Recommended value for each noise level is as below. This parameter is a setting value to have
better voice recognition under white noise or machine noise. Optimum value is different by the
noise type, so please set according to the actual used environment. For setting method, refer to
5.4 Application interface list.
Noise level(dB) Noisiness S/N ratio Amplitude
35dB Silent 10 1000
55dB Little noisy 15 1500
70dB Noisy 15 2500
For default value, refer to 5.5.1 setSnr and 5.5.3 setAmp.
S/N ratio Amplitude
Default value 10 1024