1. The unmelodious sound of the alarm was enough to wake everyone abruptly.

2. His unmelodious singing annoyed all the guests at the party.

3. The unmelodious noise from the construction site disturbed the neighborhood.

4. The unmelodious tone of the radio static made it hard to listen to the broadcast.

5. The unmelodious drone of the engine indicated a mechanical malfunction.

6. Her unmelodious voice contrasted sharply with the beautiful music playing nearby.