3 ms·
Both options should be complimentary to vibration. But best would be light and unique vibration. This way you can detect it no matter what you are doing.
by BartSaM 9y ago
Both options should be complimentary to vibration. But best would be light and unique vibration. This way you can detect it no matter what you are doing.
- zie 9y agoIndeed. I can feel the noise from those loud building type smoke alarms, that schools and govt buildings install all the time. Household smoke alarms are pretty puny tho, I don't usually feel those unless I'm paying attention. They are such a high frequency they don't vibrate in my body much, and are not very loud comparatively.. (since they only have a 9V battery for power)