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  3PASS is now ETSI standard TS 103 224
HEAD Press Release Herzogenrath (Germany), October 7, 2014
3PASS is now ETSI standard TS 103 224
3PASS (3-dimensional Playback of Acoustic Sound Scenarios) is the new HEAD acoustics system which is capable of preserving and reproducing the essential spatial characteristics of real-life back-ground noise scenarios in different test rooms. This system is now successfully approved as ETSI standard
TS 103 224.
Its key application field is the voice and quality analysis of telecommunication devices in the presence of background noise. A noise database as specified by ETSI TS 103 224 with synchronous recordings can be used for three use cases: telephone terminal at ear, handheld hands-free terminal (HHHF) at typical user position and desktop hands-free terminal at typical user position.
The major advantages of 3PASS compared to its predecessor    HAE-BGN are its ability to preserve and reproduce the essential spatial characteristics of background noise, which makes the system valuable for the development of complex background noise reduction algorithms. This is of particular im-portance for modern smartphones, especially for those with multiple microphones and indispensable when focusing on their real life performance. Another advantage is the automated digital equalization via the front end
  labBGN (playback) and the microphone surround array    MSA I (recordings).
3PASS has a high reproduction accuracy of a background noise (cf. diagram). The dark red line is the original signal (car noise played back over several loudspeakers in a reference room). The other colors show result curves after automatic equalization in four rooms with different reverberation times.
The new HEAD acoustics system 3PASS, the corresponding microphone surround    MSA I (for sound recordings and room equalization) and the front end    labBGN are available as of now. Datasheets and other information can be found at
  3PASS logo
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Reproduction accuracy of a background noise
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Measurement setup in test room
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For immediate release. In case of publication please notify and/or provide printed copy!
Steffen Scholz
HEAD acoustics GmbH
Ebertstr. 30a,
D-52134 Herzogenrath
Phone: +49 (0) 2407 577 0
Fax: +49 (0) 2407 577 99
About HEAD acoustics GmbH:
HEAD acoustics was founded in 1986 and has been involved in noise and vibration, electroacoustics and voice quality testing since its inception. HEAD acoustics is based in Herzogenrath, Germany, with affiliates in USA, Japan and France as well as a world-wide network of representatives. The Telecom Division of HEAD acoustics manufactures telecom test equipment and provides consulting services in the field of speech and audio quality. Moreover, HEAD acoustics closely co-operates with DECT Forum, ETSI, ITU-T, 3GPP, TIA, CTIA, GSMA and other standardization bodies with regard to the development of quality standards for voice transmission and speech communication. In many partnership projects, HEAD acoustics has proven its competence and capabilities in conducting tests and optimizing communication products with respect to speech and audio quality under end-to-end as well as mouth-to-ear scenarios.
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Ebertstraße 30a
52134 Herzogenrath

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