16 May 2003 - Contents in the "Sound Measurement Labo" was moved to the "Introduction to sound measurement".
Sound Measurement Labo
 

It is not only loud noises but even relatively faint noises can be extremely irritating. Some feels like nuisance "noise", however, another may feel like soft "music". Here we will demonstrate how to measure noise using your own computer and also provide a number of concrete examples. Click here to download and buy sound measurement softwares.

Measurement equipment Digital video camera with external stereo microphones
Operation of a Sound-level Meter Operation of ACO 6146 regular sound-level meter
Handycam is installed in the car Handycam was installed in the car to record the engine sound
 

Measurement cases with Realtime Analyzer (RA) and Sound Analyzer (SA)

Airport Noise Analysis Testing 1 RA SA wave sound file Passenger jet landing noise (At Nagoya Airport)
Airport Noise Analysis Testing 2 RA SA wave sound file Noise of jets passing overhead (Measured at Heiwa park, Nagoya City)
Airport Noise Analysis Testing 3 RA SA wave sound file Landing noise in darkness (At Nagoya Airport)
Airport Noise Analysis Testing 4 RA SA wave sound file Fighter plane takeoff (Japan Air Self-Defense Force, Komaki military base)
Airport Noise Analysis Testing 5 RA SA wave sound file Helicopter (Japan Air Self-Defense Force, Komaki military base)
Airport Noise Analysis Testing 6 RA SA wave sound file Jumbo jet taking off Nagoya Airport
Airport Noise Analysis Testing 7 RA SA wave sound file Jumbo jet landing on Nagoya Airport
Airport Noise Analysis Testing 8 RA SA wave sound file Effect of the jet noise on hearing
Airport Noise Analysis Testing 9 SA wave sound file Analysis of the high frequency components of landing jet passenger plane
Airport Noise Analysis Testing 10 RA SA wave sound file Analysis of the low frequency components of jet plane

Automobile Noise Analysis Test 1 RA SA wave sound file Ferrari V8 engine exhaust noise
Automobile Noise Analysis Test 3 RA SA wave sound file ALFA ROMEO V6 engine exhaust noise
Automobile Noise Analysis Test 4 RA SA wave sound file Frequency of Ferrari V8 exhaust sound and the rev
Automobile Noise Analysis Test 5 SA wave sound file Ferrari V8 exhaust note and engine sound
Automobile Noise Analysis Test 6 SA wave sound file Ferrari V8 exhaust note analysis
Automobile Noise Analysis Test 7 RA SA wave sound file Analysis of directional information from the engine sound

Measurement of the air conditioner noise 1 RA Measurement of the background noise
Measurement of the air conditioner noise 2 RA SA Periodical diagnosis by operation sound
 

Measurement cases with Environmental noise Analysis system (EA)

Analysis of Toilet Flushing Noise 1 RA SA wave sound file Running ACF measurement of toilet flushing noise
Analysis of Toilet Flushing Noise 2 RA SA EA wave sound file Automatic measurement and identification by EA (Environmental noise Analysis system)

Relevant Technical Journal Articles

Here are links to a number of relevant technical journal articles.
Presentations at international conferences - 137th ASA/2nd EAA MEETING (Berlin)
PDF An Internet-Oriented System for Acoustic Measurements of Sound Fields (31KB)
March 1999, Berlin
Dissertation, Doctoral course of Graduate School of Science and Technology, Kobe University (Japan)
PDF Computational Systems for Sound Fields, as Tools in Design and Diagnosis (1748KB)
January 2000
Articles published in the Journal of Sound and Vibration
PDF A COMPUTATIONAL SOFTWARE FOR NOISE MEASUREMENT AND TOWARD ITS IDENTIFICATION (272KB)
March 2000, JSV
Presentations at international conferences - 17th ICA (Roma)
PDF A Computational Software for Identification of Noise - an Application for Car Engines (56KB)
September 2001, Roma
Copyright 2001-2003 Yoshimasa Electronic Inc. / ymec@ymec.com

YMEC Information Introduction to Simple Sound Measurement Sound Preference Audition Room