SYSTEMS AND METHODS FOR SOUND EXTERNALIZATION OVER HEADPHONES
First Claim
1. A sound externalization system, comprising:
- a localizer configured to collect information related to a first location of a user in an environment and a second location of an acoustically reflective surface in the environment;
a controller configured to;
determine a third location of a virtual sound source in the environment;
generate a first left head related transfer function (HRTF) and a first right HRTF that simulate characteristics of sound radiated from the virtual sound source directly to the user;
determine a reflected sound path from the virtual sound source to the user that includes reflection of sound by the acoustically reflective surface;
generate a second left HRTF and a second right HRTF that simulates characteristics of sound from the reflective surfaces to the user, wherein the second left HRTF and second right HRTF are different from the first left HRTF and first right HRTF; and
generate a sound signal corresponding to the virtual sound source.
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Abstract
A system and method for externalizing sound. The system includes a headphone assembly and a localizer configured to collect information related to a location of the user and of an acoustically reflective surface in the environment. A controller is configured to determine a location of a virtual sound source, and generate head related transfer functions that simulate characteristics of sound from the virtual sound source directly to the user and to the user via a reflection by the reflective surface. A signal processing assembly is configured to create one or more output signals by filtering the sound signal respectively with the HRTFs. Each speaker of the headphone assembly is configured to produce sound in accordance with the output signal.
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Citations
20 Claims
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1. A sound externalization system, comprising:
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a localizer configured to collect information related to a first location of a user in an environment and a second location of an acoustically reflective surface in the environment; a controller configured to; determine a third location of a virtual sound source in the environment; generate a first left head related transfer function (HRTF) and a first right HRTF that simulate characteristics of sound radiated from the virtual sound source directly to the user; determine a reflected sound path from the virtual sound source to the user that includes reflection of sound by the acoustically reflective surface; generate a second left HRTF and a second right HRTF that simulates characteristics of sound from the reflective surfaces to the user, wherein the second left HRTF and second right HRTF are different from the first left HRTF and first right HRTF; and generate a sound signal corresponding to the virtual sound source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A sound externalization system, comprising:
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a headphone assembly worn by a user; a sensor configured to detect an acoustically reflective surface in an environment in which the user is located; a controller configured to; associate a first location in the environment with a virtual sound source; determine a second location of the user; determine reflected sound path simulating sound from the first location to the user that includes a reflection by the acoustically reflective surface at a third location; generate a first head related transfer function simulating characteristics of sound traveling from the first location to the second location; generate a second head related transfer function simulating characteristics of sound traveling from the third location to the second location, wherein the second head related transfer function is different from the first head related transfer function; generate a sound signal for the virtual sound source; generate a first output signal by filtering the sound signal with the first head related transfer function and a second output signal by filtering the sound signal with the second head related transfer function; and a speaker of the headphone assembly configured to produce sound in accordance with the first and second output signals.
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19. A method for externalizing sound from a headphone assembly worn by a user, comprising:
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associating a virtual sound source with a physical location in an environment in which the user is located; identifying one or more acoustically reflective surfaces in the environment; determining a reflected sound path from the physical location to the user that includes a reflection by the acoustically reflective surface; generating a first head related transfer function (HRTF) simulating characteristics of sound received by the user directly from the physical location; generating a second HRTF simulating characteristics of sound received by the user from the reflection, wherein the second HRTF is different from the first HRTF; generating a sound signal corresponding to the virtual sound source; filtering the sound signal with the first HRTF to generate a first output signal; filtering the sound signal with the second HRTF to generate a second output signal; and producing sound with a speaker of the headphone assembly in accordance with the first and second output signals. - View Dependent Claims (20)
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Specification