When encountering unexpected sounds where you are unsure how to respond, it is important to consider the context and social norms to decide the most appropriate reaction. Saying “yes” can work if you are acknowledging someone’s call or invitation, indicating receptiveness. However, if you actually hear noises suggesting someone might be present in a space that should be private, clearly announcing “someone’s in here” serves as both a warning and a signal that the space is occupied. Using this phrase helps prevent awkward interruptions and maintains privacy. Alternatively, making noise without words—such as knocking or clearing your throat—can alert others without startling them. This is particularly useful in informal settings or when you want to maintain discretion. Understanding your environment is key: for example, in professional or formal settings, a polite verbal announcement is preferable, while informal settings allow more flexible responses. In all cases, the goal is to communicate effectively while respecting others' privacy and comfort. Reacting confidently and appropriately to unexpected noises can reduce misunderstandings and foster better social interactions.