showstack / glossary / wow-and-flutter
Wow and flutter 抖晃度
Speed variation in a mechanical replay medium, named at two rates. Wow is slow variation, below roughly four hertz, heard as pitch drifting. Flutter is faster, heard as roughness or warble on sustained notes. Wow usually points at a capstan or a slipping pinch roller; flutter more often at a bearing or tape dragging on a guide.
中文
機械式重播媒介的速度變動，依快慢分為兩種稱呼。抖（wow）指約四赫茲以下的慢速變動，聽感 為音高漂移；晃（flutter）指較快的變動，在持續音上聽起來是粗糙或顫抖。抖多半指向主 導軸或打滑的壓帶輪，晃則較常來自軸承或磁帶刮擦導引件。
Regional usage
| Where | Term | Note |
|---|---|---|
| UK / US | Wow and flutter | |
| HK / TW | 抖晃度 |
Easy to get wrong
Wow and flutter is not a frequency response fault and no equalisation addresses it. It is the transport, and it is measured as a percentage of speed rather than in decibels.
Sources
- AES standards for audio engineering — Audio Engineering Society primary
Understand the mechanism
Something wrong, or missing?
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