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
🇬🇧
BS EN ISO 3382-2
🇫🇷
NF EN ISO 3382-2
🇮🇹
UNI EN ISO 3382-2
🇪🇸
UNE EN ISO 3382-2
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NEN EN ISO 3382-2
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DIN EN ISO 1996-2
🇬🇧
BS EN ISO 1996-2
🇫🇷
NF EN ISO 1996-2
🇮🇹
UNI EN ISO 1996-2
🇪🇸
UNE EN ISO 1996-2
🇳🇱
NEN EN ISO 1996-2
1,670
Accredited labs
18
Countries
Showing 476–500 of 1,670 labs
Innen- und Tiefenmaße
Konventioneller
0,11 G
> 2 G
> 5 g
+ 3 more
Essex Asbestos Testing
Active
(HSG 248) – 2021
(PCM) based on HSG 248
TP03 based on HSG 248
Eton Environmental Group
Active
(HSG 248) – 2021
TP005, based on HSG 248
(PCM) based on HSG 248
IEC 61215-1-1
DIN EN 16147
DIN EN 14511-3
DIN EN ISO 10077-1
DIN EN 14511-4
+ 3 more
Eurofins Chemtest
Active
staining based on HSG 248.
(PCM) based on HSG 248
(HSG 248) – 2021
DIN EN 12457-2
DIN EN 12457-3
AC CURRENT
AC VOLTAGE (continued)
Measurement (continued)
DC CURRENT
Generation (continued)
+ 3 more
IEC 61000-6-1
IEC 61000-4-29: 2000
DIN EN 62233
IEC 61000-4-11: 2004
DIN EN 61000-4-12
+ 3 more
Eurofins Food Testing UK
Active
ISO 6579-1
ISO 6888-1
ISO 16649-2
ISO 11290-1
1) AM/M/11-2 based on BS EN
+ 3 more
Eurofins Food Testing UK
Active
Method 15.2 based on BS EN ISO
ISO 15213-2
Method 9.8 based on BS EN BS EN
Method 5.11 based on BS EN ISO
Method 4.3 based on BS EN ISO
+ 3 more
Eurofins Food Testing UK
Active
ISO 6579-1
ISO 4832
EUMM 3.03 based on BS EN
EUMM 3.07 based on BS EN ISO
BS ISO 21528-2:2017
+ 3 more
Eurofins Food Testing UK
Active
ISO 712
ISO 4833-1
on BS EN ISO 1736:2008
ISO 21528-2
BS ISO 4832:2006
+ 3 more
Thrombozytenfunktion
Agomelatin
Amisulprid (Psychopharmaka)
Amitriptylin (TZA)
Aripiprazol (Neuroleptika)
+ 3 more
Thrombozytenfunktion
Agomelatin
Amisulprid (Psychopharmaka)
Amitriptylin (TZA)
Aripiprazol (Neuroleptika)
+ 3 more
DIN EN 13141-4
DIN EN 13141-6
DIN EN 13141-7
DIN EN 13141-8
DIN EN 13141-11
+ 3 more
Glykohämoglobin A1C (HbA1c)
Basophile Granulozyten
Eosinophile Granulozyten
Erythrozytenverteilungsbreite
(RDW)
+ 3 more
Blutzellen
Basophile Granulozyten
Basophile Granulozyten, Eosinophile Gran
Eosinophile Granulozyten, Erythrozyten,
Basophile Leukozyten, absolut
+ 3 more
F.S. Fehrer Automotive
Active
DIN EN ISO 1798
DIN EN ISO 1856
Myopathie, Nemaline (TyP1, 3-10:
DIN EN ISO 14125
DIN EN ISO 179-1
+ 3 more
FCBA - Bordeaux
Active
DIN EN 947
ISO 24339
DIN CEN TS 15119-2
DIN EN ISO 3741
NF P 20-501
+ 3 more
FCBA - Champs sur Marne
Active
NF EN 716-1/-2
NF EN 12221-1/-2
NF EN 14988-1/-2
DIN 51130
DIN EN 12227
+ 3 more
ISO 16750-3
DIN EN 60068-2-53
DIN EN 60068-2-64
ISO 20653
ISO 16750-4
+ 3 more
Frequenz
- Gleichspannung
Spannungsquellen 5 µV
1 mV
Messgeräte > 10 mV
+ 3 more
FIRA International
Active
BS 7177
BS 5852
DIN EN 597-1
BS 6807:1986
DIN EN 597-2
+ 3 more
FLANDRES Analyses
Active
NF T90-111
DIN EN ISO 17294-2
DIN EN ISO 14403-2
NF EN ISO 19340
DIN EN ISO 10304-1
+ 3 more
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