Audyssey Readies "Do Not Disturb" Mode

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Los Angeles - A new post-processing technology developed by

Audyssey Laboratories

for AV receivers and HTiBs will let consumers enjoy bass late at night through their home theater without disturbing the sleep of people in other rooms.

The technology, called low-frequency containment (LFC), will appear in AV receivers later this year from Onkyo, Denon and Marantz, Audyssey told TWICE. Consumers will press a button on a remote or on a product's front panel to engage LFC mode.

The technology addresses the ability of bass waves below 200Hz to penetrate walls more easily than high-frequency waves, said Audyssey co-founder and CTO Chris Kyriakakis. To keep the peace with family members and other apartment dwellers, LFC dynamically limits bass output according to volume changes in program material. At the same time, however, LFC artificially synthesizes harmonic tones based on the lost fundamental bass tones "to give consumers the impression of improved bass," Kyriakakis explained.  These higher frequency harmonics, he noted, are less capable of penetrating walls than fundamental bass tones.

The synthesized harmonics are added on top of the existing harmonics of the program material's bass tones.

Walls muffle high-frequency sounds by 20dB more than they muffle bass frequencies, he noted.

LFC is one of three audio post-processing technologies that Audyssey plans to announce in the coming months.


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