Room impulse response prototyping using receiver distance estimations for high quality room equalisation algorithms

TL;DR

This paper introduces a novel method for creating prototype room impulse responses using receiver distance estimations, enhancing high-quality room equalisation by averaging responses across multiple positions.

Contribution

It proposes a new impulse response prototyping technique based on receiver distance estimation, improving room equalisation accuracy over existing methods.

Findings

The proposed method reduces spectral deviation in room equalisation.

Receiver distance estimation supports more accurate prototype RIR formation.

The approach outperforms traditional methods in simulated environments.

Abstract

Room equalisation aims to increase the quality of loudspeaker reproduction in reverberant environments, compensating for colouration caused by imperfect room reflections and frequency dependant loudspeaker directivity. A common technique in the field of room equalisation, is to invert a prototype Room Impulse Response (RIR). Rather than inverting a single RIR at the listening position, a prototype response is composed of several responses distributed around the listening area. This paper proposes a method of impulse response prototyping, using estimated receiver positions, to form a weighted average prototype response. A method of receiver distance estimation is described, supporting the implementation of the prototype RIR. The proposed prototyping method is compared to other methods by measuring their post equalisation spectral deviation at several positions in a simulated room.