Digital signage in public spaces is generally silent. However, the emission of sound with the
aim of generating recallability produces noise, which can be uncomfortable for passersby in …

The paper presents results of numerical calculations and experimental data on the
directional pattern of two 38-element parametric arrays composed of ultrasound sources …

Abstract Parametric Array Loudspeaker is a directional sound technology that uses
ultrasound amplitude modulation to generate audible sound in a specific propagation path …

To the naked ear, the installation Being With The Waves appears silent, but a hidden
composition of voices, instrumental tones, and maritime sounds is revealed through wearing …

Open spaces filled with multiple sound sources playing varied music can lead to discomfort,
particularly for those with hearing disabilities, due to the blending of sounds into an indistinct …

This article concerns the realization of two sound installations that use a parametric
(directional) loudspeaker as a central element of their working systems. The Soundhouse is …

Sound wave, as an important component in daily life, has the characteristic of 360°
propagation, which is difficult to propagate in a fixed area, resulting in noise pollution and …

Noise reduction is the major issue in the loudspeaker for the application of the musical
instruments and related areas. In this paper, a noise disturbance control of a loudspeaker …

Spatial comfort is an important element for spatial design to ensure that individuals are
comfortable. One parameter is acoustics, and measures such as lowering the level of …

Parametric array loudspeakers (PALs) are known for their capability of generating highly
directional audio sound waves. Owing to this feature, they are used as secondary sources in …