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Method For Masking A Sound Signal Generated By An Element Of The Skin Of An Aircraft

一种声音信号、飞行器的技术，应用在电气元件、飞机零件、通过产生旋涡等方向，能够解决增加飞行器阻力、增加飞行器重量等问题，达到增大强度的效果

Active Publication Date: 2018-02-09
AIRBUS OPERATIONS (SAS)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] While these various solutions are satisfactory from the point of view of reducing the acoustic signature, they require skin-mounted devices, and these devices add weight and potentially drag to the aircraft

Method used

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  • Method For Masking A Sound Signal Generated By An Element Of The Skin Of An Aircraft
  • Method For Masking A Sound Signal Generated By An Element Of The Skin Of An Aircraft
  • Method For Masking A Sound Signal Generated By An Element Of The Skin Of An Aircraft

Examples

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Embodiment Construction

[0033] figure 1 An aircraft 100 is shown including a skin 102 extending around the aircraft 100 . Aircraft 100 moves in an airflow, indicated herein by arrow 10 .

[0034] The skin 102 has a plurality of elements 104a to 104b which are also in the airflow 10 and are, for example, cavities formed in the skin or additions such as antennas protruding subsequently. Each of these elements 104 a to 104 b produces an acoustic signal due to the air flow 10 .

[0035] In the ensuing description, the element marked with 104a is called generating element 104a, that is to say, the generating element 104a is the element that generates the sound signal that has to be masked, and the element marked with 104b is called masking element, That is to say, the masking element is an element that generates another sound signal for masking the sound signal generated by the generating element 104a.

[0036] The principle of the present invention is not to eliminate the sound signal generated by the...

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Abstract

A masking method includes: a step of choosing a generating element which is part of the skin of an aircraft, a first step of measuring a fundamental frequency of a sound signal emitted by the generating element, a step of selecting a masking element which is part of the skin, a second step of measuring a fundamental frequency of another sound signal emitted by the masking element, a step of modification of the structure of the masking element in such a way as to shift the fundamental frequency of the sound signal emitted by the masking element to a frequency lower than the fundamental frequency of the sound signal emitted by the generating element. Such a masking method thus makes it possible to mask the sound signal emitted by the generating element by the sound signal emitted by the masking element.

Description

technical field [0001] The invention relates to a method for masking sound signals produced in an air flow by elements of the skin of an aircraft, wherein the skin has at least one other element in the air flow, and to a method comprising A skinned aircraft, wherein the structure of said further element of the skin has been modified by the implementation of a masking method. Background technique [0002] The aircraft includes a skin that surrounds the structure of the aircraft and is in contact with the airflow in which the aircraft moves. This skin has many elements that also protrude into the airflow. These elements are, for example, cavities formed in the skin or additions such as antennas protruding subsequently. [0003] Due to the air flow, these various elements generate acoustic signals, in particular howling. [0004] In the case of cavities, these acoustic signals are produced due to the impingement of the vortex generated at the upstream edge on the downstream ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64C1/40G10K11/175
CPCB64C1/40G10K11/1752G10K11/161B64C2220/00B64C23/06Y02T50/10H04R3/04H04R29/001H04R2499/13
Inventor 尼古拉·莫兰伊莎贝尔·布莱
Owner AIRBUS OPERATIONS (SAS)