AES Store

Journal Forum

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

Accurate Calculation of Radiation and Diffraction from Loudspeaker Enclosures at Low Frequency - June 2013
9 comments

New Measurement Techniques for Portable Listening Devices: Technical Report - October 2013
1 comment

Access Journal Forum

AES E-Library

The Resonances of Loudspeaker Diaphragms

The resonance frequencies of several shapes of loudspeaker diaphragms have been calculated using BOSOR 4 (based on the Variational Finite Difference technique) and a Finite-Element programme. Calculations for a typical paper cone confirm that resonances are present over the whole frequency range, the lowest one being subsonic. The effect of altering the cone profile is to raise some frequencies and lower others. It is confirmed that sandwich construction can increase the dynamic bending stiffness by as much as several thousand times. Calculations on dome diaphragms suggest that with suitable design, there is a region where all resonances can be placed below or above the working range. The presence of a previously unsuspected torsional resonance is revealed by the method of calculation used. This resonance will not affect the frequency response and will be undetectable by holography, although it will affect the transient response. The method of calculation also enables buckling loads to be determined, so that it may be possible to calculate the onset of subharmonic.

Authors:
Affiliation:
AES Convention: Paper Number:
Publication Date:

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