Vortex shedding spans scales from sub-audible pitches to hour-long ocean eddies

Evidence

Vortices form on all kinds of scales. They may be shed as air passes a tiny thread, or as it flows by islands in the ocean, as the Landsat photograph in figure 14.1 shows. Very small vortices around tiny objects may have a pitch too high for us to hear, and vortices around islands may have a period of 15 minutes or an hour. Around buildings, vortices may be produced at a rate of one per 5 seconds, still far too infrequent for humans to hear. — Eric J. Heller, Why You Hear What You Hear- An…, 1289

Categorization

• XREF: Connects to the Strouhal number scaling discussed in the surrounding passages and to any soundscape-writing context about wind-generated sound.