US 2020/0029150 A1 · MULTI-DRIVER LOUDSPEAKER WITH CROSS-COUPLED DUAL WAVE-COLUMNS

Abstract

A dual wave-column, dual-driver loudspeaker enclosure is described. The two drivers are cross-coupled through their respective front and back sides by two single exit wave-columns. At the ¼ wavelength frequency of the waveguide length, both drivers resonate with the waveguides, and cone motion is minimized while output is maximized. At the ½ wavelength frequency, the front wave of the first driver is in-phase with, the rear wave of the second driver such that the output is increased, reinforced, and smoothed at that frequency. At the ⅓ wavelength frequency, the two wave-column mouth outputs exhibit acoustic mutual coupling, which boosts acoustic output and reduces cone motion at the critical maximum displacement frequency.

Claims18

Dependent claims

An audio loudspeaker comprising:

a longitudinal, semi-enclosed structure having an internal baffle creating a first wave-column having a first closed end and a first exit, and a second wave-column having a second closed end and a second exit;
a first driver mounted to a first end of the baffle and configured to project resonant acoustic energy from a first polarity side of the first driver down the first wave-column at every effective odd one-quarter wavelength frequency and directly out of the second exit of the second wave-column from a second polarity side of the first driver;
and
a second driver mounted to a second end of the baffle and configured to project resonant acoustic energy from a first polarity side of the second driver down the second wave-column at every effective odd one-quarter wavelength frequency and directly out of the first exit of the first wave-column from a second polarity side of the second driver.

1 more element

A method of reducing diaphragm excursion and increasing output of drivers in a loudspeaker, comprising:

transmitting resonant acoustic energy from a first polarity side of a first driver down a throat of a first wave-column past a second polarity side of a second driver and out an exit of the first wave-column;
transmitting resonant acoustic energy from a first polarity side of the second driver down a throat of a second wave-column past a second polarity side of the first driver and out an exit of the second wave-column;
and
configuring the first and second wave-columns so that the first and second drivers are cross-coupled such that at an effective one-quarter wavelength frequency, a maximum cone excursion of each driver is minimized and acoustic output is maximized relative to defined reference values.

1 more element

Dependencies are inferred from the claim text.

Multi-driver loudspeaker with cross-coupled dual wave-columns

Life of this patent

Multi-driver loudspeaker with cross-coupled dual wave-columns

Life of this patent

Abstract

Claims18