TS 295 ISO 31-2

TS 295 ISO 31-2 is a terminology standard for the names and symbols of quantities and units used to describe periodic and related phenomena. It supports consistent measurement notation in fields such as oscillation, wave behaviour and vibration, where the same physical idea can otherwise appear under different symbols or wording.

The language of periodic quantities

In general technical use, periodic phenomena are described through quantities that express repetition in time or in phase. Terms such as period, frequency, angular frequency, phase and amplitude are central to describing how a signal behaves. The subject of this standard is the naming and symbolisation of those quantities; it is about a shared technical language rather than calculation procedures.

The standard covers the names and symbols for quantities and units associated with periodic and related phenomena. In practice, that helps improve the readability of measurement reports, reduces symbol inconsistency in engineering documents and supports uniform presentation across disciplines. It is especially relevant to signal processing, acoustics, vibration analysis and general scientific notation.

Position of this edition

This listing represents a Turkish edition based on ISO 31-2:1992 with Amendment 1 and is marked as withdrawn. It is therefore useful for understanding established SI-style notation and for interpreting older technical documents, while its covered subject remains limited to the naming and symbol use for this part of the quantities-and-units system.