You may remember from your science classes in school that the speed of sound is a constant, but this statement is entirely dependent on the material through which sound is propagating. Different medium transmit sound at very different speeds. So, let’s look at some typical materials that most people would encounter in indoor live sound … Lire la suite
Once upon a time, churches had no sound systems. The congregation sang their lyrics and sight read their vocal parts from hymnals. Fast forward to today; most churches are using current technology including sound systems, lighting, presentation software, cameras for live streaming and more. Unlike church from ages past, we must consider how to integrate … Lire la suite
Subwoofers are great solutions to extend the low frequency performance of your PA system, and there are three aspects to consider carefully when setting up a subwoofer. In the following order. Subwoofer Placement If subwoofers are used in many portable and installed PA applications to enhance the overall listening and performance experience, their placement in … Lire la suite
If you are familiar attending any type of live show, concert or performance using PA loudspeakers, you will most likely also agree that loudspeakers’ humming, hissing or buzzing noise can quickly ruin a performance. This article reviews each of the common causes of audible (and irritating) loudspeakers’ hum and hiss, and discusses effective strategies to … Lire la suite
The history of the subwoofer is inextricably linked with the evolution of the full-range loudspeaker. In the mid-1950s, various manufacturers of hi-fi loudspeakers began to introduce compact, closed-box enclosures that featured long-throw woofers, and in the early 1970s a talented engineer working at Jensen, named James Novak, developed the equations describing a bass reflex (or … Lire la suite
An auto mixer, or automatic microphone mixer, is a live sound-mixing tool that automatically reduces the volume level of a microphone’s audio signal when it is not used. This is particularly valuable when several microphones are open at the same time, reducing extraneous noise. In this article, we will describe how the Auto Mixer function … Lire la suite
To start, let’s recall that the low frequency energy radiated from a conventional subwoofer is effectively omnidirectional below 200 Hz. This is because the directivity of a subwoofer is related to the ratio of its size to the length of the sound wave it produces. The length, or size, of the sound wave is inversely … Lire la suite
La couverture verticale est sans doute plus importante encore que la couverture horizontale. L’élévation et la distance sont essentielles. Pour une couverture adéquate des enceintes, il est essentiel de trouver le bon équilibre entre la distance et le volume sonore des enceintes... Lire la suite
Chaque espace présente des difficultés de couverture qui lui sont propres. Par exemple, dans un club avec des plafonds bas, vous n’aurez jamais une hauteur suffisante pour suspendre un système de diffusion line array ; pour la sonorisation en plein air, l’absence de murs apporte, elle aussi, son lot de contraintes... Lire la suite
Pour obtenir un son et des performances optimales, il faut prendre en compte un certain nombre de facteurs pour le placement de vos enceintes. Cette série en quatre parties a pour but d'aborder un certain nombre de ces difficultés et de donner des conseils utiles et pratiques pour obtenir un son de qualité dans n'importe quel lieu... Lire la suite