Scope
IEC 60268-16:2011
Speech Transmission Index Measurement
This test method provides an objective measure of speech intelligibility in acoustic environments using the Speech Transmission Index (STI) method. STI quantifies how well speech is transmitted through an acoustic space, accounting for noise, reverberation, and frequency distortion. The measurement is critical for evaluating communication effectiveness in public address systems, conference rooms, classrooms, and other speech-critical environments. Venues with high standards for speech clarity use this method to verify system performance and acoustic suitability. ISO 17025 accreditation ensures reliable assessment of speech intelligibility compliance with design standards.
What it measures
- Speech Transmission Index (STI) value (0-1 scale)
- Modulation transfer function across frequency bands
- Speech intelligibility rating and quality assessment
- Impact of noise and reverberation on speech clarity
- Communication effectiveness and auditory conditions
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DIN EN ISO 3382-2
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BS EN ISO 3382-2
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NF EN ISO 3382-2
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UNI EN ISO 3382-2
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UNE EN ISO 3382-2
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NEN EN ISO 3382-2
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DIN EN ISO 1996-2
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BS EN ISO 1996-2
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NF EN ISO 1996-2
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UNI EN ISO 1996-2
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UNE EN ISO 1996-2
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NEN EN ISO 1996-2
1,868
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20
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Showing 651–675 of 1,868 labs
Gesellschaft für Materialforschung und Prüfungsanstalt für das Bauwesen Leipzig mbH - MFPA Leipzig
Active
ISO 1920-4
DIN EN 480-11
DIN EN 12350-1
DIN EN 12350-3
DIN EN 12350-6
+ 3 more
Aktivator ADP / Epinephrin
Thrombozytenfunktionstest
Basophile Leukozyten, absolut
Basophile Leukozyten
Eosinophile Leukozyten
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ISO 354
BS EN ISO 717-2:2020
ISO 7171
UNE-EN ISO 3382-2
BS EN ISO 10140-3:2021
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Gigahertz Optik
Active
spektrale
Mikrofonempfindlichkeit
Photodioden
1 µA/W
Bestrahlungsstärke
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Glasgow City Council
Active
(HSG 248) – 2021
staining based on HSG 248
F2011 (BS 696:Part 2:1989)
F0131 (BS 1741:10-1:1989) using
F0008 (BS 696:Part 2:1989) using
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DIN EN 15136
DIN EN 137
Clause 6.24, EN 13274-5:2001
Clause 7.4.1.1, EN 13274-3:2001
Clause 7.4.1.2, EN 13274-3:2001
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Greengea Srl
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DIN EN ISO 7730
ISO 5667-5
DIN EN ISO 6888-1
DIN 40633-2
DIN EN ISO 18593
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Grohe
Active
DIN EN 22248
DIN ISO 1817
IEC 60512-11-11
IEC 60512-11-12
DIN EN ISO 3822-1
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ISO 10195
ISO 17704
BS EN ISO 14362-1
ISO 14184-1
ISO 4045
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Gully Howard Technical
Active
HSG 227 (2004))
(HSG 264, 2012)
HSG 264 (2012) and Appx. 3 of
Appendix 5 of HSG 227 (2004))
ASTM D3835-16
ASTM D6204-19a
ASTM D6601-19
ISO 11443
ASTM D1238-13
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ISO 3105
ASTM D 7042
ISO 2909
ASTM D 5293
ISO 3104
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HAZET-WERK Hermann Zerver
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Tensile testing of metallic materials (I
Vickers hardness test (ISO 6507)
Drehmoment 2 N·m
Handbetätigte
20 N·m
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Verschlusszeit (ADP, Epinephrin, P2Y12)
HCG, ß-HCG
PF4/Heparin-Komplexe
induzierte Thrombozytopenie, Test)
Differenzialblutbild (maschinell)
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HCG, ß-HCG
Ampicillin
Cefipim
Hämoglobin A1c (HbA1c)
Linecolid
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ADP-Antagonisten
TRAP-6-Aktivierung
ASS-Inhibition
Thrombozyten-Funktionsanalyse
β-HCG
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HENSOLDT Sensors
Active
- Gleichspannung
Spannungsmessgeräte
> 20 V
> 200 V
Spannungsquellen
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UNE-EN ISO 16283-1
UNE-EN ISO 16283-2
UNE-EN ISO 16283-3
UNE-EN ISO 3382-2
Natriumchlorid
Glucose
Kalium
Natrium
Albumin
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