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.
A RealAge answered. Lowering your blood pressure (BP) may be as easy as shutting the window or turning down your MP3 player. Too much noise exposure correlates with a steady rise in blood pressure. Loud sounds are known to stimulate the pituitary-adrenal cortical system.Heart rate basically soars in response to sudden loud sounds, like slamming doors or honking horns. But a gradual rise in noise hurts, too.In a study of assembly plant workers, the higher the volume got, the higher their blood pressure rose.eart rate basically soars in response to sudden loud sounds, like slamming doors or honking horns. But a gradual rise in noise hurts, too. In a study of assembly plant workers, the higher the volume got, the higher their blood pressure rose.