AES Store

Journal Forum

Reflecting on Reflections - June 2014
1 comment

Quiet Thoughts on a Deafening Problem - May 2014
1 comment

Perceptual Effects of Dynamic Range Compression in Popular Music Recordings - January 2014
5 comments

Access Journal Forum

AES E-Library

Refinements in the Impulse Testing of Loudspeakers

The evaluation of a loudspeaker's transfer function or frequency response (amplitude and phase) via digital processing of its measured impulse response is now an established technique. During ten years experience with the method, many practical problems of measuring accuracy were encountered. This paper will discuss the causes and suggested remedies for reducing measuring errors, particularly at low frequencies, due to drive unit nonlinearities, signal averaging in the presence of both random and synchronous background noise, and DC offset in the A/D converter. In addition, a novel method for accurately determining the free field response of a loudspeaker system down to very low frequencies will be presented. It will be shown that it is possible using this method to estimate a loudspeaker's frequency response to an accuracy of better than 1 dB down to 20 Hz using only 10mS of its impulse response measured in a non-anechoic environment.

Author:
Affiliation:
AES Convention: Paper Number:
Publication Date:
Subject:

Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.

Learn more about the AES E-Library

E-Library Location:

Start a discussion about this paper!


 
Facebook   Twitter   LinkedIn   Google+   YouTube   RSS News Feeds  
AES - Audio Engineering Society