Final answer:
The speaker designed for high frequencies is called a tweeter, which is smaller than a woofer, the latter being designed to handle low-frequency sounds.
Step-by-step explanation:
The type of speaker that is designed for high frequencies is known as a tweeter. Tweeters are engineered to reproduce sounds with high frequencies or short wavelengths. In contrast, speakers designed for low frequencies are called woofers. Woofers are optimized for longer wavelengths associated with low-frequency sounds. Because both high and low-frequency sounds travel at the same speed in a given medium, tweeters, which handle the high frequencies, are usually smaller in size compared to woofers.