ZAL_YB-2017

ACHIEVEMENTS ZAL GMBH
ACOUSTICS LAB
64 — 65
INNOVATIVE MEASURING
METHODOLOGY AS RESEARCH AREA
The ›EVAMAR‹ research project shows that this is not
enough in terms of optimizing acoustics research. In
collaboration with seven other research partners, including
Airbus, Hamburg University of Technology, Hamburg
University of Applied Sciences, and the Helmut Schmidt
University, ZAL is currently developing a non-contact
vibration measurement methodology. Vibrations and airborne
sound are both measured. Whereas conventional
measurement processes require the working capacity of
four persons for up to two weeks for the instrumentation
in order to determine the natural oscillation mode
of the fuselage, the newly developed procedure takes
just 30 minutes for one test – a significantly quicker and
more economical solution. The improvement of measurement
processes and research into how they can be
implemented in the Acoustics Lab are making it possible
to extend our knowledge in a way that will have a great
influence on the cabin acoustics of tomorrow.
WHEN SURFACES REPRODUCE AUDIO SIGNALS
The ›Smart Exciter Module‹ research project is exploring
the use of surfaces in the aircraft cabin to emit audio
signals. An exciter (acoustic transducer) mounted on the
rear of the panels causes the cabin trim panels to vibrate.
The panels thereby replace the membrane in a conventional
loudspeaker. This creates a so-called flat panel
speaker. Examples of audio signals in the aircraft cabin
are announcements by the cabin crew, warning tones, and
music. The research project is being conducted by ZAL
GmbH in association with Holmberg GmbH & Co. KG, a supplier
of electro-acoustic components for aircraft cabins.
HIGH-END STANDARDS
The ZAL offers equipment and
expertise for acoustic testings