(new)(英文)Santa Catarina大学通过麦克风阵列测试汽车pass-by噪声

合集下载
  1. 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
  2. 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
  3. 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。

UFSC Uses LabVIEW and NI CompactDAQ for Acoustic Beamforming in Vehicle Pass-By Noise

Acoustic Image Identifying Tire and Exhaust

Noise at 50 KPH at 1,904.3 Hz

Author(s):

Samir N.. Gerges - Federal University of Santa Catarina (UFSC)

The Laboratory of Noise and Vibration at the Federal University of Santa Catarina (UFSC) in Brazil is involved in various projects including R&D assistance to the automobile industry to adapt its products to noise and vibration standards. In addition to helping local industries, this supports academic developments in teaching and research for undergraduate and postgraduate students.

Pass-by noise tests are standardized to quantify the maximum sideline noise level during vehicle operation. The test is regulated in most countries with specific sound limits defined by relevant government agencies, typically ISO 362 – measurement of noise emitted by accelerating road vehicles. The specifications are intended to reproduce the level of noise generated by the principal noise sources during normal driving in urban traffic, typically on roads with speed limits of 50 km/h and 70 km/h. The vehicle pass-by noise test certifies that a car complies with the standard so its contribution to traffic noise is not above the permitted limit.

Many elements contribute to the total noise of a vehicle, such as the motor, exhaust, transmission, and tires. Because standard pass-by noise tests do not have the capacity to identify the sources emitting noise that leads to test failure, we needed technique a to visualize the acoustic field to identify these sources. By applying beamforming in this test, we can see which of these sources significantly contributes to the overall noise emission and has an impact on the vehicle’s pass-by noise.

Cx.P. 476 - Florian.polis

Brazil

Tel: 55) 48-2344074/3319227/3317095

Fax: (55) 48-3319677

samir@emc.ufsc.br

Acoustic Image Identifying Tire and Exhaust Noise at 50 KPH at 1,904.3 Hz

Acoustic Image Identifying Tire Noise at 70 KPH at 1,250 Hz

32-Channel Microphone Array

Layout of Test System

This case study (this "case study") was developed by a National Instruments ("NI") customer. THIS CASE STUDY IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND AND SUBJECT

相关文档
最新文档