Pressure treated lumber is lumber that has undergone a process that forces chemical preservatives into the wood. The wood is placed inside a closed cylinder. Then vacuum pressure is applied to force the preservatives into the wood. These preservatives help protect the wood from any termites or other such insects.
exists and is an alternate of. Merge this question into. Split and merge into it. Answer by SummerMaple. Confidence votes 30.3K. The larynx is where the vocal cords are located. The cords tighten and relax to change the pitch of the voice. Actual sounds are produced by the mouth and nose by changing the shape and the speed of the air as it passes through the chambers. In societies that incorporate non-tonal sounds into their language (such as certain cultures in Africa that utilize clicks), these sounds are produced by the tongue.
Laryngomalacia: Introduction. Laryngomalacia: A defect where the larynx is abnormally soft which affects voice quality and can cause breathing problems. The larynx is so soft that when inhalation occurs, the larynx collapses and obstructs the breathing passage.aryngomalacia: Introduction. Laryngomalacia: A defect where the larynx is abnormally soft which affects voice quality and can cause breathing problems. The larynx is so soft that when inhalation occurs, the larynx collapses and obstructs the breathing passage.