AES E-Library

Low-Frequency Extension of Gated Loudspeaker Measurements

The free-field response of a loudspeaker system can be approximated through a gated measurement, made in a sufficiently large space. The frequency resolution is nominally determined by the time gap between the direct sound and the first reflection, but the actual low-frequency accuracy of gated measurements is reduced also by the group delay of the loudspeaker itself. The group delay at low frequencies may cause a large fraction of the energy sound radiation to be cut off, underestimating the low-frequency response. A method is presented to estimate the approximate low-frequency response from the impedance measurement of the loudspeaker and to use the response to pre-process the acoustical measurement to improve the accuracy of the gated measurement.

Author: Backman, Juha
Affiliation: Nokia Corporation
AES Convention:124 (May 2008) Paper Number:7353 Import into BibTeX
Subject:Loudspeakers

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: (CD 124Papers)   /124/7353.pdf

Start a discussion about this paper!