1 Breakages are less as the boards are much tougher and have fibers reinforcing in them. 2  they damage less easy from general wear and tear in everyday use in a home or office. 3  It offers slightly better acoustics than standard board.  It is a superior product in case of fire.
It is normal for the solenoid to make noise, it clicks when the valve is turned on or off. It also is normal for a very soft buzzing sound to be heard when the valve is activated, but you should not be able to hear it unless you put your ear near it. If you can easily hear it buzzing, that is not normal.
Best Answer: Photophobia is a fear of light. Likewise, a fear of loud sounds is phonophobia. There's a medical condition called hyperacusis -- something is wrong with the ear itself, or the auditory receptors of the brain, so that ordinary sounds seem to be extraordinarily loud.ikewise, a fear of loud sounds is phonophobia. There's a medical condition called hyperacusis -- something is wrong with the ear itself, or the auditory receptors of the brain, so that ordinary sounds seem to be extraordinarily loud.