Whistle Notification

[Android Question]

Samsung Galaxy s3
Have set both my GMAIL and Text Message to give me a whistle notification when either is received. This part works fine.
However, the phone alert will occasionaly whistle and there is no new Gmail or no new text message present.
?

 

[dsmryder]

Samsung Galaxy s3
Have set both my GMAIL and Text Message to give me a whistle notification when either is received. This part works fine.
However, the phone alert will occasionaly whistle and there is no new Gmail or no new text message present.
?

This might be the default notification or sound for another app.