User's Manual

[CONFIDENTIAL] 2021 06
In real life, sounds come from all around us, including overhead. Having the ability
to re-create overhead sounds is a key element in making Dolby Atmos sound realistic.
The PULSE SOUNDBAR+ accomplishes this without any up-ring drivers, using
advanced algorithms and processing to virtualize the effect.
Dolby Atmos height virtualization processing leverages research and understanding of
human audio perception to simulate an immersive audio experience while using fewer
speakers. For height effects, virtualization is used to create the sensation of sound
above you, originating solely from listener-level speakers. Virtualization of surround
effects is employed to create enveloping, 360-degree audio without speakers behind
or to the side of the listener.
On a technical level, Dolby Atmos height virtualization applies carefully designed
height-cue lters to overhead audio components before they are mixed into listener-level
speakers. These lters simulate the natural spectral cues imparted by the human ear to
sounds arriving from overhead. For surround virtualization, a combination of head-related
transfer functions (HRTFs) and cross-talk cancellation are employed to approximate for
the listener’s ears the binaural cues of surround speakers. For both types of virtualization,
special care has been taken to equalize the associated lters so that the timbre of the
audio remains natural anywhere in the listening environment.
Content encoded in Dolby Atmos will provide the most realistic audio effect from a
product that delivers the Dolby Atmos experience. The discrete height elements in the
Dolby Atmos mix feed the Dolby Atmos height virtualizer, are processed by the
algorithms, and then mixed in the PULSE SOUNDBAR+.
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