US 2020/0029163 A1 · Active Room Compensation In Loudspeaker System

Abstract

A method for compensating for acoustic influence of a listening room on an acoustic output from an audio system including at least a left and a right loudspeaker, the method comprising determining a left frequency response and a right frequency response, designing a left compensation filter FL, and a right compensation filter FR, and during playback applying the left and right filters to left and right channel inputs. According to the invention, a target response in the listening position is simulated, and the left and right compensation filters are designed to filter transfer functions based on the simulated target function multiplied by an inverse of the left/right frequency responses. By relying on a simulated target instead of relying on an empirical approach, the general impact of a room can be more accurately captured by the target functions.

Claims13

Dependent claims

A method for smoothing a frequency response between a signal applied to a speaker and a resulting power average in a listening position, comprising:

determining a number of peaks per octave in the response,
for a portion of the response where the number of peaks per octave is below a first threshold, smoothing the response with a first smoothing width,
for a portion of the response where the number of peaks per octave is above a second threshold, smoothing the response with a second smoothing width,
wherein said second threshold is greater than said first threshold and said second smoothing width is wider than said first smoothing width, and
for a portion of the response where the number of peaks per octave is between the first and second thresholds, smoothing with an intermediate smoothing width.

2 more elements

Dependencies are inferred from the claim text.

Active Room Compensation In Loudspeaker System

Life of this patent

Active Room Compensation In Loudspeaker System

Life of this patent

Abstract

Claims13