Sound pressure reference level

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Acronym: pᵣ

en

Sound pressure reference level: 20 μPa (2 × 10⁻⁵ N m⁻²) (sometimes 2 × 10⁻⁴ dynes cm⁻²).

Reference: [1] Ewing (1989), Glossary of bioacoustic terms, pp. 226–227.

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To cite this website:

Ed Baker (2026) Bioacoustics & Ecoacoustics Glossary (https://glossary.acousti.cloud/). Accessed on October 6, 2026, 11:15 pm.