Digital acoustic projector – A proof of concept
| Autor: | Pierrick Lotton, Libor Husník, Philippe Béquin, Antonin Novak |
|---|---|
| Přispěvatelé: | Faculty of Electrical Engineering [Prague] (FEL CTU), Czech Technical University in Prague (CTU), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM) |
| Rok vydání: | 2021 |
| Předmět: |
[PHYS]Physics [physics]
Acoustics and Ultrasonics Computer science Acoustics 01 natural sciences Signal Parametric array [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph] law.invention Digital loudspeaker Set (abstract data type) 03 medical and health sciences 0302 clinical medicine Projector Proof of concept law 0103 physical sciences Demodulation ComputerSystemsOrganization_SPECIAL-PURPOSEANDAPPLICATION-BASEDSYSTEMS Ultrasonic sensor Loudspeaker Nonlinear propagation 030223 otorhinolaryngology 010301 acoustics |
| Zdroj: | Applied Acoustics Applied Acoustics, Elsevier, 2021, 173, ⟨10.1016/j.apacoust.2020.107667⟩ |
| ISSN: | 0003-682X |
| DOI: | 10.1016/j.apacoust.2020.107667 |
| Popis: | International audience; This paper describes a Digital Acoustic Projector (DAP), which is a hybrid sound system combining both a digital loudspeaker and a parametric array to convert directly an n-bits digital electrical signal into sound. It consists of a set of ultrasonic transducers emitting a sinusoidal signal modulated by a sampled and quantised low-frequency signal. Self demodulation effect is used to demodulate the acoustic signal during its propagation in the air. As a proof of concept, a DAP is designed to convert a 4-bit digital electrical signal into sound. First experimental results are presented. |
| Databáze: | OpenAIRE |
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