ISO 11820:1996 PDF
Acoustics — Measurements on silencers in situ
Acoustics — Measurements on silencers in situ
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 18
- Дата публикации:
- 12 декабря 1996 г.
- Издание:
- ISO IS 11820 edition 1 version 1
- ICS:
- 91.120.20
Applies to measurements on silencers in practical applications for acoustic analysis, acceptance tests and similar evaluations. Depending on the method used, the measurement is either of insertion loss or transmission loss.
Abstract
Overview
ISO 11820:1996 - "Acoustics - Measurements on silencers in situ" specifies methods for measuring the acoustic performance of silencers installed in real plant conditions. It defines procedures for determining either or of silencers used in ducts, openings and enclosures under operating conditions (e.g., gas turbines, HVAC plant, exhaust stacks, compressors). The standard covers measurement ranges (octave and one‑third‑octave bands, typically from 63 Hz to 4 kHz and, where required, lower/higher bands), treatment of flow‑related noise (regenerated sound), and the limits of applicability (not for closed high‑pressure systems where structure‑borne sound dominates).
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