"Mumblings" Natural Recordings by Native Speakers
Mumblings refer to indistinct or unintelligible sounds or words, typically made by someone who is speaking in a low or half-stated tone, or is not clearly articulating their words. In other words, it means speaking in a way that is difficult to understand, often due to a lack of clarity or volume.
To mumble means to speak in a low, indistinct, or unclear way, often making it difficult for others to understand what you are saying. It can also refer to a person who speaks in this manner, often unintentionally.