Experts may categorize a crackle as: Fine: These occur in the small airways and are soft, short, and high ... and are loud, low-pitched, and last longer than fine crackles. They may sound like ...

Loud – Something that has a high volume. Quiet – Something that has a low volume Sound waves – A sound wave is a vibration that travels through a solid, liquid (such as water) or gas (such ...

Prolonged exposure to loud ... to sounds didn't change, but the neurons' reaction did. A larger area of the auditory cortex responded to low-frequency sounds. Neurons reacting to high frequencies ...

The machines should be played at a low volume ... intensity of sound is important to consider, he said. Concretely, parents should look to make these machines as loud as “a soft shower ...