Audio 'sweet spot' makes two speakers sound like five, says Dolby
Music Industry News - as it happens
Source: Mi2N - October 29, 2002
A next-generation advanced algorithm to reproduce the dynamics and
surround sound effects of a precisely placed 5.1-channel speaker system - on
a PC equipped with just two speakers.
That's what Dolby Laboratories is promising with its Dolby Virtual Speaker,
just released as part of its "Dolby in PC" package.
How does it work?
In a typical listening environment, the sound from a speaker is reflected
within the room before reaching a listener's ears, arriving at different
times at each ear, and at different amplitudes and equalization from the
direct sound, says Dolby, going on:
"The brain's interpretation of these separate audio elements supplied to the
right and left ears allows the person to identify the direction and distance
of the sound's source.
"Dolby Virtual Speaker technology capitalizes on these biological and
psychological factors to create the impression of additional speakers
positioned exactly at the recommended location for a Dolby Digital sound
system with five physical speakers."
The company says Dolby Virtual Speaker technology processes sonic
signatures, or impulse responses, that contain all relevant information
regarding the location of the virtual speakers (ie, the "speakers" the user
perceives) to provide the brain with all the information necessary to
accurately perceive the location of sounds and the spatial depth of the
Dolby adds that it's working closely with Analog Devices and Texas
Instruments to incorporate Dolby Virtual Speaker technology into their
digital signal processors to make the technology available in traditional
entertainment-based products, such as DVD, digital television, D-VHS
players, and multimedia speaker systems.
Related News from Mi2N:
» Dolby Laboratories Launches New Virtual Speaker Technology