Sone Scale -

: The scale is intuitive; a sound with a value of 2 sones is perceived as twice as loud as 1 sone, and 4 sones is twice as loud as 2 sones. 2. The Relationship Between Sones and Phons

To understand sones, it is helpful to look at the , another unit of loudness. While phons adjust for the ear's frequency sensitivity (using Equal-Loudness Contours ), they are still logarithmic. The mathematical relationship between sones ( Lsonecap L sub s o n e end-sub ) and phons ( Lphoncap L sub p h o n end-sub ) is expressed by the formula: sone scale

C (do), D (re), E (mi), F (fa), G (sol), A (la), B (ti) : The scale is intuitive; a sound with

For example, in the key of C major, the Solfege scale would be: While phons adjust for the ear's frequency sensitivity

The Solfege scale is used in a variety of musical contexts, including:

The Sone scale is particularly useful in:

However, for engineers, acoustic measurements, or regulatory compliance, dB SPL (often A-weighted) remains the standard because it’s physically measurable and repeatable. If you see a sone rating, trust it for subjective loudness comparison – but know it’s an estimate, not a direct measurement.