DIN 45681

Acoustics Tonality Assessment for Noise Annoyance

DIN 45681 establishes methods for detecting and assessing the tonal audibility of noise immissions, which is essential for determining noise annoyance potential and regulatory compliance. Tonal noise components (pure tones or narrow-band frequencies) are perceived as more annoying than broadband noise at equivalent sound pressure levels, making tonality assessment critical for environmental noise evaluation. The standard defines objective procedures to quantify tonality and adjust noise exposure assessments accordingly. Accreditation for this test method enables laboratories to conduct accurate environmental noise impact assessments, particularly for industrial operations, mechanical systems, and wind energy projects where tonal characteristics significantly influence regulatory requirements and resident protection.

What it measures

  • Presence and audibility of tonal components in noise
  • Frequency and sound pressure level of pure tones
  • Prominence of tonal components relative to background noise
  • Tonality-adjusted noise rating and regulatory impact
  • Narrow-band spectral analysis and tone identification
🇩🇪 DIN EN ISO 1996-1 🇬🇧 BS EN ISO 1996-1 🇫🇷 NF EN ISO 1996-1 🇮🇹 UNI EN ISO 1996-1 🇪🇸 UNE EN ISO 1996-1 🇳🇱 NEN EN ISO 1996-1
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18 Countries

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DAkkS D-K-21083-01-01 Neunkirchen-Heinitz, DE
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Härte *) 20 HRA Härtevergleichsplatten 20 HRB nach Rockwell Verfahren 20 HRC 40 HRD 60 HRF + 3 more
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automatische Zelldifferenzierung Erythrozyten Leukozyten Retikulozyten Thrombozyten + 3 more
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DAkkS D-K-17222-01-01 Nossen, DE
Kraft (WPM) Werkstoffprüfmaschinen Acoustics — tonality assessment (DIN 456 messeinrichtungen von Härte (WPM) 30 HBW + 3 more
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DAkkS D-K-15122-01-00 Cunewalde, DE
Absolutdruck p abs > 41 bar Negativer und positiver Überdruck + 3 more
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DIN 53160 DIN 54034 DIN 54056 DIN EN 20105-A02 DIN EN 20105-N01 + 3 more
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Taupunkttemperatur thermometer, -80 °C bis Railway braking — urban guided transport > -35 °C bis Temperatur- −35 °C bis + 3 more
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DAkkS D-K-12094-01-02 Darmstadt, DE
–1 bar Positiver und negativer Positiver Überdruck p e > 0,0 bar Absolutdruck p abs 0,25 bar + 3 more
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Übertragungsmaß von Messmikrofonen oder Freifeld-Leerlauf- 20 Hz Freifeld -Übertragungsmaß Vorverstärker, nach IEC + 3 more
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Hydrodata

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DAkkS D-PL-18139-01-00 Oberursel, DE
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) + 3 more
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DAkkS D-K-15045-01-01 Limburg a. d. Lahn, DE
Negativer und Positiver Überdruck p e > 0,015 bar Überdruck p (ein- oder mehrgängige + 3 more
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DAkkS D-PL-18818-02-02 Schwerin, DE
DIN EN ISO 10993-1 DIN EN ISO 10993-5 DIN EN ISO 17405 ISO 10993-23 DIN EN ISO 10993-18 + 3 more
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Hygiene Nord

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DAkkS D-PL-18411-01-04 Greifswald, DE
DIN EN ISO 10993-5 DIN EN ISO 10993-1 DIN EN ISO 11737-2 DIN EN 1040 DIN EN IEC 60601-2-75 + 3 more
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DAkkS D-K-15192-01-00 Oberrot, DE
Innen- und Tiefenmaße Konventioneller Wägewert/ Massenormale Festkörpervolumen + 3 more
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I17-Wind

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DAkkS D-PL-21268-01-00 Husum, DE
ISO 9613-2
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DAkkS D-PL-20737-01-00 Bayreuth, DE
DIN 4150-1 DIN 4150-2 DIN 4150-3 DIN EN 61800-5-1: 2017
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IEL

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DAkkS D-PL-11011-01-02 Aurich, DE
DIN 45691
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DAkkS D-PL-19746-01-04 Deggendorf, DE
DIN EN ISO 17892-2 DIN EN ISO 17892-3 DIN EN ISO 17892-4 DIN 18121-2 DIN 18125-2 + 3 more
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DAkkS D-K-11332-01-02 Leipzig, DE
Kraft 10 kN Sound power — survey method (ISO 3746) Radaufstandskraft- 10 kN Prüfkraftmesseinrichtung Länge 10 mm
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DAkkS D-PL-20186-01-00 Düsseldorf, DE
DIN EN 61800-5-1: 2017
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DAkkS D-ML-13224-01-01 Berlin, DE
HbA1c Vitamin A Vitamin B1 Vitamin B2 Vitamin B6 + 3 more
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DAkkS D-ML-20687-01-00 Berlin, DE
Thrombozytenaggregometrie Drogen- und Medikamentenscreening Freie Fettsäuren Linolensäure, Eicosapentaensäure + 3 more
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DAkkS D-PL-13119-02-01 Dresden, DE
ASTM F1978 ASTM G195 DIN EN ISO 4287 DIN EN ISO 4288 DIN EN ISO 5470-1 + 3 more
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DAkkS D-K-13119-01-01 Dresden, DE
Temperaturanzeigegeräte –100 °C - Thermopaare, Thermoelemente Typ J, K und N für Widerstands- –100 °C - Direktanzeigende Thermometer + 3 more
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DAkkS D-ML-13142-01-01 Berlin, DE
Fettsäureprofil der Erythrozytenmembran Kurzkettige Fettsäuren MMA (Methylmethacrylat) Gesamtporphyrine + 3 more
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Industries

Environmental noise assessment and regulation Renewable energy and wind turbine development Industrial operations and manufacturing HVAC and building systems acoustics Transportation and infrastructure noise control

Related Standards

  • DIN 45680 Low-frequency noise measurement and assessment
  • ISO 1996-1 Acoustics — Description, measurement and assessment of environmental noise — Part 1: Basic quantities and assessment procedures
  • DIN 45645-2 Beurteilung von Musikdarbietungen durch ihre Umgebung — Teil 2: Meßtechnik und Beurteilung

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