Sounds are all around us! But have you ever stopped to think how they work? Discover how sound is a type of energy as we explore, soundwaves, frequency, sounds in nature, and more. Readers will be ready to break the sound barrier as they learn about the future of sound technology and the science of sound in the natural world. Add some fun to young readers' academic routines with Aha Academy! With everything students need to know plus brilliant biographies, amazing cross-curricular links, and inspiring career connections, this fun, fact-packed series will keep readers entertained and informed.