{"id":6276,"date":"2024-05-15T18:31:06","date_gmt":"2024-05-15T15:31:06","guid":{"rendered":"https:\/\/vertia.fi\/?page_id=6276"},"modified":"2024-07-16T12:17:58","modified_gmt":"2024-07-16T09:17:58","slug":"ilmaaaneneristavyys-ja-aanitasoeroluku","status":"publish","type":"page","link":"https:\/\/vertia.fi\/en\/ilmaaaneneristavyys-ja-aanitasoeroluku\/","title":{"rendered":"Airborne sound insulation and sound reduction index"},"content":{"rendered":"

Airborne sound insulation<\/h2>\n

Airborne sound insulation refers to the attenuation of noise as it travels from one room to another. Airborne sound refers to ordinary noise that travels through the air, such as speech or music.<\/p>\n

Footsteps, thuds, and other structural noises are better captured impact sound insulation<\/a>.<\/p>\n

Airborne sound insulation is most commonly measured in new construction and renovation projects, but in some cases it can also be applied to existing buildings.<\/p>\n

What is required for measurement<\/h2>\n\n\n\n\n\n\n
From the construction site<\/td>\nFrom a completed property<\/td>\n<\/tr>\n
Windows, doors, and other openings are complete (including those in corridors connecting rooms, etc.)<\/td>\nNotifying neighbors (we provide ready-made notices)<\/td>\n<\/tr>\n
Electricity is available in both spaces<\/td>\nElectricity is available in both spaces<\/td>\n<\/tr>\n
Construction noise was minimal during the measurement (actual recording sessions were short; I was usually able to coordinate with others)<\/td>\nThe interior design has no bearing on the result (the space may be empty or furnished in a standard manner)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Measuring airborne sound insulation<\/h2>\n

\"\"<\/p>\n

For measurement purposes, it is important that the structures are complete, or at least sufficiently complete for measurement. For example, there should be no remaining gaps or openings\u2014such as those caused by unfinished construction\u2014through which sound could travel from one space to another. This is because the measurement is performed by placing a large omnidirectional loudspeaker in one of the rooms (the sound source room), from which the noise to be measured is generated. For the measurement, the doors, windows, and similar openings in the rooms are, of course, closed.<\/p>\n

The noise produced by the loudspeaker is first measured in the sound source room, i.e., the same space where the noise is generated. Afterward, the same noise is measured in the measurement room, which is usually an adjacent, lower, or upper space. The measurement result thus reflects this difference, i.e., the sound insulation of the structures. The measurement is repeated with the speaker in two different positions. As supplementary measurements, background noise is also measured in both rooms, and the reverberation time is measured in the measurement room.<\/p>\n

The measurement method is described in the standard SFS-EN ISO 16283-1. The standard also specifies the requirements for measurement equipment.<\/p>\n

Airborne sound insulation index and standardized sound level difference<\/h2>\n

The measurement value established for field measurements and used in various laws and regulations is the standardized sound level difference Dnt,w (previously, the equivalent R\u2019w dB was used).<\/p>\n

Since this result was obtained from field measurements, the reading does not reflect the sound insulation of a single structure, such as a wall (compare with laboratory measurements), but rather the combined sound insulation of all surrounding structures, as sound travels from one space to another via lateral transmission (e.g., through floors, doors, hallways, ceilings, or ventilation ducts). Even a small gap in any of these structures can significantly affect the result.<\/p>\n

Measurements and analysis of the results are performed across a range of frequencies (100\u20133150 Hz); in other words, a frequency analysis is conducted when calculating the results. However, the final result is summarized into a single figure that reflects the overall picture.<\/p>\n

The higher the Dnt,w (dB) value, the better the sound insulation of the structures.<\/p>\n

\"\"<\/p>\n

Airborne sound insulation requirements<\/h2>\n

Requirements for new construction (796\/2017 Decree of the Ministry of the Environment on the Acoustic Environment of Buildings<\/a>):<\/p>\n\n\n\n\n\n
Room size<\/td>\nMinimum permissible sound level difference D<\/em>nT,w (dB)<\/td>\n<\/tr>\n
Between apartments, guest rooms, or patient rooms<\/td>\n55<\/td>\n<\/tr>\n
From the hallway to a living room, guest room, or patient room<\/td>\n39<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Guideline values for other types of buildings are set forth in the Ministry of the Environment\u2019s 2018 guidelines on the acoustic environment of buildings.<\/p>\n

 <\/p>","protected":false},"excerpt":{"rendered":"

Ilma\u00e4\u00e4nenerist\u00e4vyys Ilma\u00e4\u00e4nenerist\u00e4vyys kuvastaa tilasta toiseen tapahtuvaa melun vaimenemista. Ilma\u00e4\u00e4nell\u00e4 tarkoitetaan tavanomaista ilmassa kulkeutuvaa melua, kuten puhe tai musiikki. Askel\u00e4\u00e4ni\u00e4, kolahduksia ja muita runko\u00e4\u00e4ni\u00e4 kuvastaa paremmin askel\u00e4\u00e4nenerist\u00e4vyys. Useimmiten ilma\u00e4\u00e4nenerist\u00e4vyytt\u00e4 mitataan uudis- ja korjausrakentamisessa, mutta joissain tapauksissa sit\u00e4 voidaan hy\u00f6dynt\u00e4\u00e4 my\u00f6s valmiissa kiinteist\u00f6iss\u00e4. Mit\u00e4 mittaaminen edellytt\u00e4\u00e4 Rakennusty\u00f6maalta Valmiilta kiinteist\u00f6lt\u00e4 Ikkunat, ovet ja muut l\u00e4piviennit valmiita (my\u00f6s tiloja Read more about Ilma\u00e4\u00e4nenerist\u00e4vyys ja \u00e4\u00e4nitasoeroluku<\/span>[…]<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-6276","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"\nIlma\u00e4\u00e4nenerist\u00e4vyys ja \u00e4\u00e4nitasoeroluku | Vertia.fi<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/vertia.fi\/en\/ilmaaaneneristavyys-ja-aanitasoeroluku\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ilma\u00e4\u00e4nenerist\u00e4vyys ja \u00e4\u00e4nitasoeroluku | Vertia.fi\" \/>\n<meta property=\"og:description\" content=\"Ilma\u00e4\u00e4nenerist\u00e4vyys Ilma\u00e4\u00e4nenerist\u00e4vyys kuvastaa tilasta toiseen tapahtuvaa melun vaimenemista. Ilma\u00e4\u00e4nell\u00e4 tarkoitetaan tavanomaista ilmassa kulkeutuvaa melua, kuten puhe tai musiikki. Askel\u00e4\u00e4ni\u00e4, kolahduksia ja muita runko\u00e4\u00e4ni\u00e4 kuvastaa paremmin askel\u00e4\u00e4nenerist\u00e4vyys. Useimmiten ilma\u00e4\u00e4nenerist\u00e4vyytt\u00e4 mitataan uudis- ja korjausrakentamisessa, mutta joissain tapauksissa sit\u00e4 voidaan hy\u00f6dynt\u00e4\u00e4 my\u00f6s valmiissa kiinteist\u00f6iss\u00e4. 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