US 9,219,974 B2 · Method and apparatus for simultaneously controlling near sound field and far sound field

Abstract

An apparatus and method for forming a Personal Sound Zone (PSZ) at a location of a listener are provided. An apparatus for simultaneously controlling a near sound field and a far sound field may classify the near sound field and the far sound field based on a distance between an array speaker and a listener, and may control the near sound field and the far sound field and thus, it is possible to perform focusing even when the listener is located in adjacent to the array speaker. Additionally, the apparatus may generate a directive sound source using the array speaker, and at the same time, may reduce a sound pressure in a far field, thereby reducing a sound source spreading to the far field while focusing is performed at the location of the listener.

Claims24

Dependent claims

An apparatus for simultaneously controlling a near sound field and a far sound field, the apparatus comprising:

a filter generating unit to generate a filter to simultaneously control the near sound field and the far sound field based on a ratio of a first sound pressure energy at a location of a listener to a second sound pressure energy related to the far sound field and the near sound field excluding the location of the listener wherein the near sound field corresponds to a region from a sound source to the location of the listener;
and
a filter processing unit to generate a multi-channel signal by processing a filter value of the generated filter and an input signal,
wherein the second sound pressure energy is obtained based on sound pressure enemies of a first dark zone, which corresponds to a region excluding the location of the listener from the near sound field, and a second dark zone which corresponds to the far sound field.

1 more element

A method for simultaneously controlling a near sound field and a far sound field, the method comprising:

generating a filter to simultaneously control the near sound field and the far sound field based on a ratio of a first sound pressure energy at a location of the listener to a second sound pressure energy related to the far sound field and the near sound field excluding the location of the listener, wherein the near sound field corresponds to a region from a sound source to the location of the listener;
and
generating, by way of a processor, a multi-channel signal by processing a filter value of the generated filter and an input signal,
wherein the second sound pressure energy is obtained based on sound pressure energies of a first dark zone, which corresponds to a region excluding the location of the listener from the near sound field, and a second dark zone which corresponds to the far sound field.

1 more element

Dependencies are inferred from the claim text.

Method and apparatus for simultaneously controlling near sound field and far sound field

Life of this patent

Method and apparatus for simultaneously controlling near sound field and far sound field

Life of this patent

Abstract

Claims24