TS 1309 ISO 31-7

TS 1309 ISO 31-7 is a units-standard for acoustics that sets out the names and symbols of quantities and units used in the acoustic field, and provides conversion factors where appropriate. It supports consistent technical communication by aligning terminology for sound-related measurements and calculations.

Why naming and symbol consistency matters in acoustics

Acoustics deals with the generation, propagation, perception, and measurement of sound. Common quantities in this field include sound pressure, sound power, sound intensity, frequency, and sound level. A standard of this kind is valuable because it tells users how these concepts should be named and symbolized, helping reports, specifications, textbooks, and engineering documentation use the same technical language.

What this document covers

• Names and symbols for acoustic quantities
• Names and symbols for acoustic units
• Conversion factors where appropriate
• Terminological and unit conventions based on ISO 31-7:1992+Amd 1

In general technical practice, acoustic quantities are often expressed together with logarithmic levels, so consistent symbols and units are especially important. Conceptually, this standard is about shared technical language rather than a measurement method. Because TS 1309 ISO 31-7 is withdrawn, it now functions as a historical reference, but it remains useful for understanding the established presentation of acoustic quantities and units.