Title:
音を発する表面の表面要素からもたらされる音圧を算出する方法
Document Type and Number:
Japanese Patent JP4527123
Kind Code:
B2
Abstract:
A three-dimensional array ( 10 ) of microphones (M) is used to determine the three-dimensional sound field above a surface element (DeltaS) of a sound emitting surface (S), and the air-particle velocity (un) at the surface element (DeltaS) is determined using Near-Field Acoustical Holography (NAH). A volume velocity sound source ( 11 ) is used to emit a volume velocity (Qv) in a listening position, and the array ( 10 ) of microphones (M) is used to determine the resulting three-dimensional sound field above the surface element (DeltaS), and using NAH the resulting sound pressure at the surface element (DeltaS) is determined. The acoustic transfer function (H) between the surface element (DeltaS) and the listening position is assumed to be reciprocal and is determined as the ratio of the resulting sound pressure at the surface element (DeltaS) to the volume velocity (Qv). The sound pressure in the listening position resulting from the surface element (DeltaS) is determined as Deltap=H.(un. DeltaS).
Inventors:
Jarden Jarden
Application Number:
JP2006538656A
Publication Date:
August 18, 2010
Filing Date:
November 10, 2004
Export Citation:
Assignee:
Brüel and Kear Sound and Vibration Measurement A/S
International Classes:
G01H3/00; G01H3/10; G01H17/00; H04R1/40
Domestic Patent References:
| JP10267745A | ||||
| JP9229758A | ||||
| JP55109834U | ||||
| JP9113248A | ||||
| JP8159864A | ||||
| JP8233931A | ||||
| JP2002195876A |
Foreign References:
| WO2003069594A1 |
Attorney, Agent or Firm:
Masao Okabe
Nobuaki Kato
Okabe
Shinichi Usui
Takao Ochi
Teruhisa Motomiya
Asahi Shinmitsu
Katsumi Miyama
Nobuaki Kato
Okabe
Shinichi Usui
Takao Ochi
Teruhisa Motomiya
Asahi Shinmitsu
Katsumi Miyama