[Single tone slowly rising in pitch and volume]
[Single tone rising more quickly in pitch and volume]
[Single tone continues to accelerate in pitch and volume increase]
[Rising tone peaks and then oscillates between two frequencies]
[Oscillation increases in speed and pitch and the difference in frequencies decreases]
[Oscillation narrows and then begins to widen again]
[Oscillation range continues to widen]
[Oscillation range widens more]
[Oscillation continues]
Pitch of oscillation drops]
[Speed decreases and range increases as pitch drops]
[Pitch drops and range decreases]
[range decreases more]
[speed of oscillation increases]
[Oscillation remains fairly stable]
[Range begins to increase]
[Range decreases abruptly to even less than before]
[Oscillation approaches single tone again]
[Range abruptly increases once more]
[Pitch varies slightly]
[Range shrinks once again and volume drops]
[Audio fades out]