In trying to raise the quality and popularity of AM broadcasting, a study explored listeners' attitudes toward transmission and receiver bandwidths. Results suggest that for highly compressed audio, such as rock or pop music, listeners heard very little difference between 7 and 10 kHz. However, for audio with fewer masking characteristics, such as speech and classical music, listeners preferred lower bandwidths of 5 to 7 kHz because they reduced real-world noise from adjacent channels. More is less; 7 kHz may be optimum for AM broadcasting.

Authors: Sheffield, Ellyn G.; Kean, John
Affiliations: Psychology Department, Towson University, Towson, MD, USA; NPR Labs, National Public Radio, Washington, DC, USA(See document for exact affiliation information.)
JAES Volume 57 Issue 5 pp. 326-337; May 2009
Publication Date: May 28, 2009

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