Loud and low voice. To describe the chewing sound, we can start with the characteristics of the sound, such as the tone, loudness and timbre of the sound. We can use the words "loud", "low" and "soft" to describe the size of the chewing sound. For example, describe the sound someone makes when eating as "loud" or describe the chewing sound as "soft". It can also describe the rhythm of chewing, such as "fast", "slow" and "rhythmic". For example, describe the chewing sound as "rhythmic", or describe someone eating quickly and making a "quick" chewing sound.