From 3D design reviews up to fully tailored solutions, SELTECH is here to support you and allow you to always be innovative and competitive in the audio and electronics market.
Mainly relying on Lumped Element (LEM) and Boundary Element (BEM) models, Seltech offer the possibility to develop and tailor a loudspeaker system to your application. The LEM approach is well known for its fast computation time when a 1-dimensional analysis is sufficient, while the BEM approach allows to predict 3-dimensional phenomena typically occurring on a speaker diaphragm.
Modeling at the transducer level allows for precise customization of sound signatures, significantly enhancing audio performance, especially when mechanical modifications are not feasible.
At Seltech, we use the renowned COMSOL Multiphysics solution for this purpose. This advanced tool provides detailed insights into acoustic and structural behaviors, enabling us to fine-tune every aspect of the sound signature.
By leveraging these capabilities, we ensure that our clients receive speakers that are high-performing and tailor-made to their specific requirements, delivering a truly personalized audio experience.
When integrated into a device, volumes surrounding the speaker will impact its bandwidth: a tight rear volume (A) will control the low frequency region while a non-direct front volume (B) will control the high frequency region. A proper design of these volume is a fundamental step for getting the correct bandwidth into your application.
Two historical techniques allowing to extend the LF response are the so-called Bass-Reflex and Passive Radiator systems, respectively invented by A. L. Thuras in 1932 and H. Olson in 1935. Both methods rely on the resonator principle, which when correctly tuned will bring additional LF energy below the speaker roll-off frequency.
To go further, if an audio processor is considered in the design, an equalization stage will allow to both extend the LF response and correct unwanted phenomena occurring in the system by applying multiple filters in cascade.
Correctly evaluating the acoustical behavior of a speaker system is always a challenge, especially in low frequencies. Thanks to environments like anechoic chambers, Seltech is able to fully qualify a system, from the axis response to the spatial directivity, including harmonic and non-harmonic distortion.
Headquarters
SAS SELTECH
2, Allée des Cerisiers
F – 94042 Créteil FRANCE
Tel EU : +33 1 48 92 90 02
Tel NA : +1 (919) 481 6896
SELTECH is an international solution provider with deep expertise in acoustics and sensors. We offer innovative solutions to our customers’ challenges, from design to production.
