STN EN ISO 11691
| Name: | STN EN ISO 11691 |
| Validity: | Valid |
| Number of pages: | 20 |
| Language: |
EN
|
| Paper: | 14,10€ |
| Electronic version |
a) Only read (without ability to print and copy)
12,69€ b) Without ability to print, with ability to copy (printscreen) 14,10€ c) With ability to print and copy (printscreen) 18,33€ |
| Slovak title | Akustika. Meranie vloženého útlmu potrubných tlmičov bez prúdenia média. Laboratórna metóda (ISO 11691: 2020) |
| English title | Acoustics - Measurement of insertion loss of ducted silencers without flow - Laboratory survey method (ISO 11691:2020) |
| Release Date: | 01. 05. 2021 |
| Date of withdrawal: | |
| ICS: | 91.120.20 |
| Sorting character/National clasification code | 01 1670 |
| Level of incorporation: | idt EN ISO 11691:2020, idt ISO 11691:2020 |
| Official Journal | 04/21 |
| Amendments | |
| Replaced by: | |
| Repleces: | STN EN ISO 11691:2009-12 (01 1670) |
| Note in Official Journal: | |
| Subject of the standard: | This document specifies a laboratory substitution method to determine the insertion loss without flow of ducted, mainly absorbent, circular and rectangular silencers, as well as other duct elements for use in ventilating and air-conditioning systems. NOTE Laboratory measurement procedures for ducted silencers with superimposed flow are described in ISO 7235[5]. This document is applicable to silencers where the design velocity does not exceed 15 m/s. As the method does not include self-generated flow noise, this document is not suitable for tests on silencers where this type of noise is of great importance for the evaluation of the silencer performance. As most silencers, particularly in offices and dwelling, have design velocities below 15 m/s, this document can often be a cost-efficient alternative to ISO 7235[5]. The insertion loss determined according to this document in a laboratory is not necessarily the same as the insertion loss obtained in an installation in the field. |
| Preview: | Náhľad normy (PDF) |