| 摘要 |
Disclosed is a method for providing an announcement to output sounds through speakers installed in noise areas, including the steps of: generating metadata, which is associated with a sound outputted through a speaker, from a sound signal before the sound signal is outputted through at least one of the speakers installed in noise areas; converting the metadata to a sound wave signal of an inaudible band; and generating a mixing signal by mixing the metadata converted to the sound wave signal of the inaudible band and the sound signal. |
