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 Development of a Porous Metal Cone Loudspeaker

The paper describes the deficiencies encountered with bass drivers using conventional pulp paper cones with regard to sub-harmonic resonances resulting from non-rigid piston action of the cone. Prior attempts of improvements with the addition of certain fibers to the cone pulp material have been made. The development of a cone is described, explaining the reasons for selecting a double-layer construction with nickel of a certain porosity as cone material plus the addition of aluminum foil to achieve high bending stiffness (with high Young's modulus) and still low weight for a high upper usable frequency limit. Comparative measurements are shown plus photos visualizing holographically cone vibration patterns by the time-average technique. Using this double-layer construction, the onset of harmful resonances could be considerably moved up in frequency to extend the useful change of the driver.

Authors:
Affiliations:
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