Keeping mobile inside a glass before sleeping: Why more people are doing it and its benefits - It Amplifies Your Morning Alarm Naturally | The Economic Times
When you place your phone speaker-down inside a glass, the sound waves bounce off the curved walls and get directed upward, making your alarm noticeably louder without any app or setting change. A practical trick for heavy sleepers who somehow manage to sleep through everything. It Amplifies Your Morning Alarm Naturally