Annotation	pos	Low Freq (Hz)	High Freq (Hz)	Begin Time (s)	End Time (s)	duration	filename
U	34.875	595.8312749999998	771.8727249999997	34.3875	35.3625	0.9749999999999944	20250412_072235UTC_V00OS11.WAV
T	39.537496	446.872725	636.456275	39.137496	39.937496	0.7999999999999972	20250412_072235UTC_V00OS11.WAV
U	41.3	609.3749999999997	771.8749999999997	40.725	41.875	1.1500000000000057	20250412_072235UTC_V00OS11.WAV
U	47.5	649.9977249999996	798.9562749999997	47.0	48.0	1.0	20250412_072235UTC_V00OS11.WAV