Scope
DIN 45680
Low-Frequency Noise Measurement and Assessment
DIN 45680 specifies procedures for measuring and evaluating low-frequency noise (typically 8 Hz to 160 Hz) immissions in buildings and indoor environments. Low-frequency noise from sources such as wind turbines, industrial equipment, traffic, and HVAC systems can cause annoyance and health effects even at sound pressure levels below conventional noise limits. The standard defines frequency-weighted assessment methods, measurement locations, and evaluation criteria specific to low-frequency phenomena. Accreditation for this test method enables laboratories to conduct specialized assessments required for wind energy projects, industrial operations, and building acoustics investigations in sensitive environments.
What it measures
- Sound pressure levels in the low-frequency range (8–160 Hz)
- Low-frequency weighted acceleration and vibration metrics
- Frequency content and tonal characteristics of low-frequency sources
- Indoor sound field distribution and room resonance effects
- Infrasound component presence and magnitude
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DIN EN ISO 389-7
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BS EN ISO 389-7
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NF EN ISO 389-7
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UNI EN ISO 389-7
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UNE EN ISO 389-7
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NEN EN ISO 389-7
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DIN EN ISO 226
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BS EN ISO 226
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NF EN ISO 226
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UNI EN ISO 226
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UNE EN ISO 226
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NEN EN ISO 226
1,670
Accredited labs
18
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DIN EN ISO 10140-1
DIN EN ISO 717-1
DIN EN ISO 10140-2
DIN EN ISO 10140-4
DIN EN ISO 10140-5
HaBu Hauck Prüftechnik
Active
Härte *) 20 HRA
Härtevergleichsplatten 20 HRB
nach Rockwell Verfahren 20 HRC
40 HRD
60 HRF
+ 3 more
Hampshire Scientific Service
Active
(HSG 248) - 2021
ASB/SOP/OM8 based on HSG 248
ASB/SOP/OM6 based on HSG 248
DIN EN 12697-11
on BS 4401:Part 3:1970(1986)
+ 3 more
Hann Tucker Associates
Active
ISO 7171
ISO 1407
BS EN ISO 140-4:1998
BS EN ISO 717-2:2020
Hartford Steam Boiler UK
Active
BS 2790 - Specification for the design a
BS 1113 - Specification for the design a
BS EN 13480 Parts 1 to 8 - Metallic
EN 13445 – Parts 1 to 10 Unfired pressur
BS EN ISO 15614 and ASME IX
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automatische Zelldifferenzierung
Erythrozyten
Leukozyten
Retikulozyten
Thrombozyten
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Healthy Abode
Active
ISO 7171
BS EN ISO 140-4:1998
BS EN ISO 16283-1:2014+A1:2017BS EN ISO
BS EN ISO 16283-2:2020
HTM 08-01 - 2013
+ 2 more
(HSG 264, 2012)
and Appx. 3 of HSG 227 (2004))
Executive guides HSG 264 (2012)
Kraft (WPM)
Werkstoffprüfmaschinen
Acoustics — tonality assessment (DIN 456
messeinrichtungen von
Härte (WPM) 30 HBW
+ 3 more
Absolutdruck p
abs
> 41 bar
Negativer und
positiver Überdruck
+ 3 more
Heywood Williams Components
Active
DIN EN 1026
DIN EN 12046-2
BS 6375-1:2015 + A1:2016 and the
DIN EN 1027
DIN EN 1629
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Hohenstein Laboratories
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DIN 53160
DIN 54034
DIN 54056
DIN EN 20105-A02
DIN EN 20105-N01
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Taupunkttemperatur
thermometer, -80 °C bis
Railway braking — urban guided transport
> -35 °C bis
Temperatur- −35 °C bis
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–1 bar
Positiver und negativer
Positiver Überdruck p e
> 0,0 bar
Absolutdruck p abs 0,25 bar
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Hottinger Brüel & Kjaer
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Übertragungsmaß von
Messmikrofonen oder
Freifeld-Leerlauf- 20 Hz
Freifeld -Übertragungsmaß
Vorverstärker, nach IEC
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Hydrodata
Active
DIN EN ISO 5667-1 (A 4)
DIN 38402-A 12
DIN 38402-A 13
DIN 38402-A 15
DIN EN ISO 5667-3 (A 21)
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Hydrotechnik
Active
Negativer und
Positiver Überdruck p e
> 0,015 bar
Überdruck p
(ein- oder mehrgängige
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HygCen Germany
Active
DIN EN ISO 10993-1
DIN EN ISO 10993-5
DIN EN ISO 17405
ISO 10993-23
DIN EN ISO 10993-18
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Hygiene Nord
Active
DIN EN ISO 10993-5
DIN EN ISO 10993-1
DIN EN ISO 11737-2
DIN EN 1040
DIN EN IEC 60601-2-75
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Innen- und Tiefenmaße
Konventioneller
Wägewert/
Massenormale
Festkörpervolumen
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I2 Analytical
Active
staining based on HSG 248.
(HSG 248) – 2021
(PCM) based on HSG 248
A007B based on BS EN15051-2:2013 +1:2016
DIN EN 12457-3
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