Brass Instruments

What is a Brass Instrument?   A brass instrument produces sound by sympathetic vibration of air in a tubular resonator in sympathy with the vibration of the player’s lips. Brass instruments are also called labrosones, which means “lip-vibrated...

Heil Air-Motion Speakers

What are Heil Air-Motion Speakers?   People often confuse Air-Motion Speakers’with ribbon loudspeakers when they see the folded diaphragms set in the shorthorn. But they are quite different. A ribbon radiates the sound by the whole diaphragm moving backward...

Woodwind Instruments

Woodwind instruments and their history   Woodwind instruments are wind instruments, and they are made of wood or metal. They include the flute, oboe, clarinet, bassoon, saxophone, bagpipe, and their family members. The orchestral and band instruments were developed in...

Flat Panel Loudspeakers

Flat panel speakers 101   Engineers investigated flat panel speakers in terms of structural vibration and acoustic radiation. A panel speaker primarily consists of a panel and an inertia exciter. Contrary to conventional speakers, they have flexural resonance and...

LFO (Low-Frequency Oscillation)

  What is LFO?   LFO or Low-frequency oscillation is an electronic frequency which is usually below 20 Hz or at the bottom of the audio range. So, the human ear cannot hear it. It creates a rhythmic pulse or sweep and is often used to modulate synthesizers,...

Bending Wave Speakers

The principle of Bending Wave Speakers   One of the ways to illustrate the basic principle of how bending wave speakers operate, the following image could be helpful. By throwing a stone into the lake, the water surface is being destabilized by its impulse. This...