The term "drum signal" refers to a type of communication method that involves conveying information through the use of drums. Synonyms for this term might include "percussion communication," "drum messaging," or even "drum language." In many cultures throughout history, drum signals were used to communicate important information such as warnings, announcements, or even battle plans. Other synonyms for "drum signal" might include "drum code," "drum beat," or "drum pattern." Regardless of the specific term used, the concept of using drums to communicate is a fascinating aspect of human history and an example of the versatility and creativity of human language.