Perceptual Effects of Dynamic Range Compression in Popular Music Recordings - January 2014
Accurate Calculation of Radiation and Diffraction from Loudspeaker Enclosures at Low Frequency - June 2013
New Measurement Techniques for Portable Listening Devices: Technical Report - October 2013
Amplitude and Frequency Modulation Distortion of a Loudspeaker
The measurement techniques and the causes of amplitude and frequency modulation distortions are discussed using a two-way coaxial type loudspeaker system. The distortion due to amplitude modulation is caused by the dependence of the radiation efficiency of the high frequency driver on the displacement of the diaphragm of the low frequency driver. The distortion due to frequency modulation seems to be produced when the high frequency sound has a non-zero particle velocity in the axis direction at the surface of the low frequency driver's diaphragm. The symmetry of the sidebands of the summed modulation distortion (intermodulation distortion) indicates that the amplitude and frequency modulation distortions are 90 deg out of phase with each other.
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.