Pronunciation: [sˈa͡ʊnd ˈɒf] (IPA) 
The phrase "sound off" means to speak loudly or clearly. The spelling of "sound off" is a bit tricky when it comes to pronunciation. The word "sound" is pronounced /saʊnd/ with the diphthong vowel sound /aʊ/ that can sometimes be confused with the /oʊ/ sound, as in "soak." The word "off" is pronounced /ɒf/ with a short "o" sound as in "hot." Therefore, "sound off" is pronounced /saʊnd ɒf/, not /soʊnd/ /ɑf/.
"Sound off" is a phrasal verb that is used mainly in informal contexts and has multiple meanings.
The primary definition of "sound off" is to speak or express one's opinion loudly or assertively. It implies a strong and confident manner of speaking, often used when expressing a disagreement, criticism, or dissatisfaction. For example, during a meeting or discussion, someone may sound off about a particular issue, expressing their opinions in a forceful and assertive way.
Additionally, "sound off" can also mean to make a loud noise, typically in a rhythmic pattern. This usage is commonly found in military contexts, where soldiers are required to follow specific marching orders or drill routines. They are instructed to sound off, or make a rhythmic noise such as shouting or stomping their feet, in order to maintain synchronization and discipline within a unit.
Furthermore, in some contexts, "sound off" can mean to offer a response or reply immediately when asked for one. It implies a quick and prompt reaction, often used in situations where an immediate answer is required or expected. For instance, during roll call, individuals are expected to sound off by stating their names or numbers without delay.
Overall, "sound off" encompasses the ideas of speaking or making noise assertively, expressing opinions forcefully, and offering prompt responses. This phrase is widely used in various contexts, including social discussions, military drills, and routine roll calls.
The phrase "sound off" has its origins in military jargon. It comes from the practice of soldiers distinctly voicing their names or identification numbers during roll calls or drills. The word "sound" here means "to make a loud, clear noise", while "off" means "to speak or express oneself". Over time, the term "sound off" has expanded beyond the military context and is now used more generally to mean speaking up or expressing one's opinion forcefully.
