The STC is a single number rating scale that measures a wall, ceiling, or floor assembly's ability to block sound transmission. The higher the number, the greater the drop in decibel levels bleeding through the surface.he STC is a single number rating scale that measures a wall, ceiling, or floor assembly's ability to block sound transmission. The higher the number, the greater the drop in decibel levels bleeding through the surface.
There isn't a set time when mums-to-be start to show a pregnant belly. Every woman is different. If you're a first-time mum, you could begin developing a baby bump any time between 12 and 16 weeks. But if this isn't your first baby, you may start showing sooner.This is because the muscles in your uterus (womb) and belly may already have been stretched from your last pregnancy.our age can influence when you start to look pregnant. Older mums often start showing earlier than young mums. This is because younger women are more likely to have stronger stomach muscles, which can disguise their bumps.
4. I am pregnant with my 4th child, and I started showing at 5 weeks, that's how I knew that i was pregnant. With my other three children I started showing between the 10th and 15th week, so my guess everything is fine.