SOUNDS ALL AROUND

A basic introduction to the properties and measurement of sound.

A short-haired, brown-skinned child and a dog with a bandanna around its neck serve as cheerful guides through informal informational text and textured, cartoon illustrations. Everyday scenes, like a busy city street, appear alongside more fanciful ones, like a dog-versus-child drag race. Descriptions of various sounds lead into explanations of sound’s forms and functions as well as related facts about animals (for example, bats use echolocation) and prompts for experiments that readers can do on their own (like feeling for vibrations in your neck when you hum). Concentric circles and repeated curves help readers spot sound waves in every situation. The content is broader than it is deep: While it doesn’t contain a complete physical description of a pressure wave, for instance, it does have a simple basic explanation of how sounds travel from the world into our brains. It doesn’t diagram human inner ear bones, either, but it does feature a nifty graph of the hearing ranges of 12 different animals. One notable misstep is the spread about decibels, which fails to communicate that this measure of sound’s power doesn’t increase in linear fashion; 20 dB is not 10 plus louder than 10 dB, but 10 times louder. That’s pretty important for readers trying to follow the recommendation “To keep your ears safe, stay away from really loud noise”! (This book was reviewed digitally.)

A decent overview that’s more approachable than a textbook.