Generation of a drive signal for sound transducer

R.M. Aarts (Inventor), Th.P.J. Peeters (Inventor)

Research output: PatentPatent publication

Abstract

An apparatus for generating a drive signal for a sound transducer (109) comprises a sound generator (101) which provides an input audio signal. A divider (101) divides the input audio signal into at least a low frequency signal and a high frequency signal and an expander (105) generates an expanded signal by applying a dynamic range expansion to the low frequency signal. A combiner (107) then generates the drive signal by combining the expanded signal and the higher frequency signal. The threshold for applying the dynamic range extension may be adjusted depending on the amplitude of the low frequency signal. The low frequency signal may furthermore be compressed into a narrow frequency band around a resonance frequency.; The approach may allow improved audio quality especially from high Q low frequency sound transducers by attenuating decay parts of bass signals thereby reducing sustain or ringing for bass notes
Original languageEnglish
Patent numberUS 8934643B2
Publication statusPublished - 2015

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sound transducers
low frequencies
audio signals
dynamic range
sound generators
dividers

Cite this

Aarts, R. M., & Peeters, T. P. J. (2015). Generation of a drive signal for sound transducer. (Patent No. US 8934643B2).
Aarts, R.M. (Inventor) ; Peeters, Th.P.J. (Inventor). / Generation of a drive signal for sound transducer. Patent No.: US 8934643B2.
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Aarts, RM & Peeters, TPJ 2015, Generation of a drive signal for sound transducer, Patent No. US 8934643B2.

Generation of a drive signal for sound transducer. / Aarts, R.M. (Inventor); Peeters, Th.P.J. (Inventor).

Patent No.: US 8934643B2.

Research output: PatentPatent publication

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AB - An apparatus for generating a drive signal for a sound transducer (109) comprises a sound generator (101) which provides an input audio signal. A divider (101) divides the input audio signal into at least a low frequency signal and a high frequency signal and an expander (105) generates an expanded signal by applying a dynamic range expansion to the low frequency signal. A combiner (107) then generates the drive signal by combining the expanded signal and the higher frequency signal. The threshold for applying the dynamic range extension may be adjusted depending on the amplitude of the low frequency signal. The low frequency signal may furthermore be compressed into a narrow frequency band around a resonance frequency.; The approach may allow improved audio quality especially from high Q low frequency sound transducers by attenuating decay parts of bass signals thereby reducing sustain or ringing for bass notes

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Aarts RM, Peeters TPJ, inventors. Generation of a drive signal for sound transducer. US 8934643B2. 2015.