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
🇩🇪 DIN EN ISO 389-7 🇬🇧 BS EN ISO 389-7 🇫🇷 NF EN ISO 389-7 🇮🇹 UNI EN ISO 389-7 🇪🇸 UNE EN ISO 389-7 🇳🇱 NEN EN ISO 389-7 🇩🇪 DIN EN ISO 226 🇬🇧 BS EN ISO 226 🇫🇷 NF EN ISO 226 🇮🇹 UNI EN ISO 226 🇪🇸 UNE EN ISO 226 🇳🇱 NEN EN ISO 226
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Sound intensity — scanning method (ISO 9 Härteprüfmaschinen Knoop- und 70 HR15N 42 HR30N + 3 more
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DAkkS D-K-18164-01-00 Partenstein, DE
Metrologic, Software von Metrologic Group ≤ 9090 mm CAM 2, Software von Münchingen, D Chur, CH, ≤ 5000 mm + 3 more
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8tree GmbH 8tree Calibration Lab

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8tree Scanner / 0 mm bis 100 mm Laterale Größe von Tiefenmaß/ -unterstand (Härteskalen HV0,01
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DAkkS D-K-17303-01-01 Dresden, DE
Kraft 0,5 N Zug- und Druckkraft Vibration measuring instruments — requir Sound power — in-situ using reference so 20 kN + 3 more
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ABB AG Kalibrierlaboratorium für Druck, Durchfluss und Temperatur

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DAkkS D-PL-14560-01-00 Teltow, DE
DIN ISO 8297 DIN 45645-1 DIN 45645-2 DIN 45680 Beiblatt 1 ISO 11338-2 + 2 more
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IEC 61000-4-2: 2008 VDE 0847-4-2 IEC 61000-4-3: 2006 VDE 0847 IEC 61000-4-4: 2012 + 3 more
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ALS Germany

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DIN EN ISO 15587-1 DIN EN ISO 15587-2 DIN EN ISO 14403-2 DIN 38405-4 DIN 38405-8 + 3 more
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AMETEK CTS Europe GmbH Kalibrierlabor

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DAkkS D-K-15033-01-00 Berlin, DE
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AMETEK GmbH Geschäftsbereich Taylor Hobson

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DAkkS D-K-15032-02-00 Weiterstadt, DE
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DAkkS D-K-15060-01-00 Dettingen unter Teck, DE
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DAkkS D-K-20974-01-00 Cadolzburg, DE
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Ahlborn Meß- und Regelungstechnik

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DAkkS D-K-19342-01-02 Holzkirchen, DE
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DAkkS D-K-18731-01-01 Manching, DE
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DIN 4150-1 DIN 4150-2 DIN 4150-3 DIN EN 61400-11
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Renewable energy (wind turbine) development and operation Industrial noise and vibration control Building acoustics and occupant protection Environmental health and public protection Regulatory compliance and permit assessment

Related Standards

  • DIN 45681 Acoustics — Tonality assessment
  • ISO 389-7 Acoustics — Reference zero for the calibration of audiometric equipment — Part 7: Reference threshold of hearing under free and diffuse sound field conditions
  • ISO 226 Acoustics — Normal equal-loudness-level contours

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