Refrigerator hum from inside closed refrigerator. Recorded in mono mp3 mode on a Zoom H2. The recorder then created a 2-track file (and I assume both tracks are identical). Compressed and normalized to -3.1 db in Audacity. Exported in flac mode.<br/>RefrigHum_Inside_2min.flac<br/>聲道：2<br/>類型：flac<br/>kitchen、refrigerator、fridge、appliance、household、noise<br/>廚房、冰箱、冰箱、器具、家庭、噪聲<br/>資料來源：freesound ( https://freesound.org )