Test of font sizes

Paragraph using common.css, was 18px, HHHHHHHH:18pxHHHH”

Paragraph using font size 18px

Paragraph using font size 16px

Paragraph using font size 1.875em

Heading h2 HHHH!HHHH font 30pxHHHH!HHHH 1.875

Sound is what we hear — people talking, music, city noise. There are also sounds we don’t hear, infrasound and ultrasound.