Sound discomfort level determining method for aircraft, involves calculating kurtosis of samples of sound level measurements, determining database of variations of level based on speed components, and level based on kurtosis

摘要

#CMT# #/CMT# The method involves equipping external microphones (11) on an aircraft e.g. rotocraft, and measuring sound levels, by using the microphones, during a reference flight of the aircraft. Speed components of the aircraft are measured with respect to air and mass of the aircraft is measured. Kurtosis of samples of sound level measurements is calculated. A database (15) of variations of a sound discomfort level is determined based on the speed components. Sound discomfort level is determined based on the kurtosis, in case of the determination of the aircraft mass. #CMT# : #/CMT# Independent claims are also included for the following: (1) a method for indicating sound discomfort level at exterior of an aircraft (2) a program comprising code segments for performing a method for determining a sound level discomfort at exterior of an aircraft (3) a program comprising a code for indicating sound discomfort level at exterior of an aircraft (4) an embedded system for indication of a sound discomfort level at exterior of an aircraft. #CMT#USE : #/CMT# Method for determining a data representing sound discomfort level at exterior of an aircraft e.g. rotocraft, in helicopter manufacturing field, where the discomfort level is felt by a human being situated at exterior of the aircraft. #CMT#ADVANTAGE : #/CMT# The method permits to determine the sound discomfort level created by operation of the aircraft, in a simple, improved and real-time manner, for a pilot of the aircraft, without the need for a sound level measurement. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic view of main components of an external sound discomfort level determination system and its interoperations for implementation of a method for determining sound discomfort level and generation of an embeddable sound discomfort database. 10 : Apparent mass estimation unit 11 : Microphones 12 : Air speed estimation or measurement unit 13 : Sound discomfort level estimation module 14 : Model production module 15 : Discomfort level variations database.