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Prolight & Sound Frankfurt 2019

Klippel at Prolight & Sound Frankfurt


General Information

Date: 2nd - 5th April 2019
Location: Messe Frankfurt / Main
Booth: #B90
Hall: 8.0

KLIPPEL Presentations at CAVIS - Congress for Audiovisual Integrated Systems at Prolight


New Standard for Assessing Maximum Output SPLmax

Wednesday, April 3rd, 2019 @ 11:00
Hall 4, Level C, Room: Entente
Presenter: Robert Werner

Abstract:
The new standard IEC 60268-21 defines acoustical measurements for assessing the sound pressure output of active and passive loudspeaker systems. It introduces a powerful characteristic SPLmax that corresponds to the maximum sound pressure level generated by a broadband stimulus (e.g. noise), on-axis at a specified distance (e.g. 1 m). The manufacturer rates this value for specified measurement conditions and a defined stimulus considering the requirements in the particular application and verifying that the device under test can handle this amplitude over 100 h. This presentation discusses various test methods (e.g. as proposed by CEA 2034) applied to find the thermal and mechanical limits of SPLmax and addresses the practical use of the rated SPLmax for gain adjustment in active system testing.

Software Complements Loudspeaker Hardware

Wednesday, April 3rd, 2019 @ 12:00
Hall 4, Level C, Room: Entente
Presenter: Peter Paul Junghanns

Abstract:
Digital signal processing, amplification and the electro-acoustical conversion converge to one active transducer, providing more sound output at higher quality by using less size, weight, energy and manufacturing cost. Adaptive nonlinear control technology based on monitoring the electric input current cancels undesired signal distortion, actively protects the transducer against mechanical and electrical overload and stabilizes the voice coil at the optimum rest position to ensure maximum excursion over product life.  This control software opens new degrees of freedom for the passive transducer and system development. The tutorial presents a new design concept that optimizes efficiency and voltage sensitivity while using a minimum of hardware resources. The design steps are illustrated through practical examples using new simulation, measurement and diagnostic tools that analyze the performance of the audio device with nonlinear control.


Tuesday, 2019-04-02 13:58 Age: 21 Days