timestamp,freq_hz,vol,duration_s,avg_db,min_db,max_db,samples
2026-06-16T16:44:31,250,0.2,3.0,56.6,56.3,56.8,7
2026-06-16T16:44:34,500,0.2,3.0,56.0,56.0,56.1,6
2026-06-16T16:44:38,1000,0.2,3.0,57.3,56.2,58.1,6
2026-06-16T16:44:41,2000,0.2,3.0,61.8,58.6,64.4,5
2026-06-16T16:44:45,4000,0.2,3.0,63.1,61.1,65.2,6