ONO SOKKI - (Discontinued) OS-2750 Fluctuation Sound Analysis Pack

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OS-2750 Fluctuation Sound Analysis Pack

OS-2000 Series

New concept of sound evaluation parameter enables extraction of annoying sound. Best-suited to the sound evaluation of time fluctuation

Fluctuation Sound Analyzer the OS-2750 is package software consists of the OS-2700 and plug-in options including fluctuation sound analyzer which is developed with new concept of sound quality evaluation parameter.
This software makes clear sound features based on the two axes of frequency and fluctuating frequency by using new concept of [time fluctuation] as well as six parameters of physical quantities such as loudness, sharpness, roughness, fluctuation strength, AI (Articulation Index), tonality.

Roughness for representing the roughness of sound, or fluctuation strength for representing the fluctuation of sound serve is one of the analysis parameters based on time axis. But each parameter has an advantage and disadvantage when evaluating fluctuating sound in a wide range of frequencies.

Fluctuation sound analyzer provides a parameter that is capable of dealing with a wide range of variable frequencies. There are plenty of sounds that annoy you even though they are not so loud. The OS-2750 fluctuation sound analyzer can make clear features of such sound quality and perform more sophisticated analysis than with conventional techniques. Using the OS-2750 achieves improving of sound quality, cost reduction of test, speed-up of development period and so on.

Features

Capable of intuitive timbre evaluation. Various fluctuating sound cycles as well as six parameters of physical quantities can be displayed in a single color map. (six parameters: loudness, sharpness, roughness, fluctuation strength, AI (Articulation Index) and tonality)

Effective to extract only fluctuating components hidden in background noise with large level

Up to four specified fluctuation components of time trend can be overlaid at the same time.

IIR filter function can reproduce recorded data before and after passing through frequency filter in real time. You can change filter coefficient freely while hearing those sound to perform re-analysis of the data.

Comparison of multiple files and multiple search conditions allows smooth analyses.

Large amount of data processing and data mining greatly help efficient and speedy data analysis/evaluation.

Variable frequency range can be set from 0.5 Hz so that the sound having slowly-fluctuating components can be extracted.

sample of Analysis sounds

Example of fluctuation sound analysis

Knocking sound during fuel injection (humming sound)

The figure1 on the below shows the result of performing FFT analysis. A striped pattern seen in the 5 kHz band is the humming sound. Since the background noise of the low frequency band (800 kHz or less) is high, it is extremely hard to extract this temporal fluctuating component from such a level. The figure2 shows the result of performing Fluctuation sound analysis for the same sound. The squares where the frequency axis (horizontal axis) representing the high and low timbre and the variable frequency axis (vertical axis) representing the period of temporal fluctuation intersect at 5 kHz and 25 Hz, are displayed in a strong color as characteristics of the humming sound.

T/M gear rattling noise<rattling noise>

Since the gear rattling noise having frequency components in the 800 Hz frequency band is hidden in the background noise, any characteristics cannot be found by FFT analysis (Figure1). The squares where the horizontal axis representing the timbre and the vertical axis representing variable period intersect at 800 Hz and 20 Hz, are displayed in a strong color as characteristics of the rattling noise (Figure2). Fluctuation sound analysis enables evaluation of various temporal fluctuation characteristics that can hardly be detected by the amount of the sound level.

Basic specification

Item	Specification	Remarks
Basic functions of Fluctuation sound analyzer	Analysis interval averaging function	Minimum analysis interval 200 ms (When 0.5 Hz: analysis interval 4000 ms)
	Analysis interval overlap	Any integer can be set.
	Variable frequency range selection function	A value between the lower limit of 0.5 Hz and the upper limit of 200 Hz can be set (in 0.5 increments).
	Variable frequency bandwidth selection function	A value between the minimum of 0.5 Hz and maximum of 100 Hz can be set (in 0.5 increments).
	Time trend display function	Four components can be overlaid at the same time.
	Masking effect ON/OFF function
	Animation output function	Output of fluctuation sound analysis results synchronized to time waveforms.
	Loudness analysis function	Possible to display spectrum graph only

Item			OS-2500	OS-2600	OS-2700	OS-2710 Pack for bench	OS-2720 FFT Analysis pack	OS-2740 Sound Qualitiy Evalution pack	OS-2750 Fluctuation Sound Analysis pack
Basic functions	Waveform editing functions
	Numerical data display and editing functions
	Search function		(Delta display supported)
	Marker function		(Automatic marker placement function)
	Sound playback function^*1		(Repeat available)
	Search function		Logic settings supported, high and low values / level trigger / range trigger / difference values for each condition
	Merging/combining sections
	Printing function
Display	Number of tracks		Up to 1,000 tracks
	Number of data items		Up to 10 items for each track
Sampling frequency			0.01 Hz to 20 MHz
Data import	Number of files		Up to 10 files
	Number of channels		Up to 512 channels
	Number of data items		Up to 500 million points (Number of files x number of channels x number of records)
	Data import format		ASCII (.txt, .csv)^2 / WAVE (.wav)^3/ DS/CF (.dat,.rcd)^4/ ORF (.orf) / AU-4100A (.inf) / VARTS-II (.dat) / FAMS-8000(.thd,.lhd)/KY-1000 (.trn, .frz, .ave,.log, .txt) / MCU (.mat) / WS-5160 (.s01, s02)/TEAC TAFFmat (.hdr) ^5 / HIOKI MEMORY HiCORDER (.mem)^6 / Meidensh MEIDACS (.meid)^7 / Yokogawa Electric Corporation WVF / WDF (.wvf, .wdf)^8
Data export formats	File format		CSV(.csv) / WAVE(.wav) / ORF(.orf) / OC-1300 series transfer function^9
Data editing	Changing of channel settings/ Signal type settings
	Merged file generation tool/ file merge tool/waveform generator tool		-	-
Signal processing function	Simple operation/ moving average/ event counter
	Search value extraction/ temporal calculus/ Level adjustment/ F/V converter/ Calculations between channels/ Resampling		-
	Hilbert transform/ Taper processing		-	-
	FIR filter	OS-0253 FIR filter (option)
	IIR filter	OS-0261 IIR Filter (option)
Custom	Graphic equalizer
	Parametric equalizer
	Statistical processing (interval)
	OC-1300 Controller^*9
	Signal calibration/ playback(Absolute sound pressure)^10/ recording^10		-	-
Waveform analysis	Basic Statistics	OS-0251: Statistics Analysis (option)
	2 data Analysis
	3 data Analysis
	Basic FFT Analysis	OS-0252: FFT Analysis (option)
	Cross FFT Analysis
	Constant-width Tracking Analysis	OS-0262: Tracking Analysis (option)
	Time-frequency Analysis	OS-0263 Time-frequency Analysis (option)
	1/N Octave Analysis	OS-0264 1/N Octave Analysis (option)
	Sound Quality Evaluation	OS-0271: Sound Quality Evaluation (option)
	Speech Intelligibility Analysis
	Fluctuation Sound Analysis	OS-0272 Fluctuation Sound Analysis (option)
:Provided as standard / :optionally provided / -:Not provided

*1: The cycle accuracy differs depending on any of the following: operating environment, processing conditions, or sampling frequency.

*2: The comma delimiter and tab delimiter can be read.

*3: Limited to Microsoft^® Windows^® -standard RIFF-format PCM sound data (uncompressed).

*4: Limited to internal sampling data.

*5: [DR-C, DR-F/M, DS] series, GX-1, LX-10/20, LX-110/120. For applicable models, refer to this page before purchasing.

*6: 8870, 8861-50/8860-50, 8861/8860, 8855, 8847, 8842/8841, 8835-01, 8826, 8808/8807. For applicable models, refer to this page before purchasing.

*7: Limited to the high-speed measurement and continuous measurement data files measured with Meidensha MEIDACS-DY (6100P/6200P/6300P/6400P/6500P/6600P) series ver.3.0 or later (Note: Average measurement data files cannot be read.)

*8: DL750/9000/7400/1700/1700E/1600 series, WE7000, SL1400, SL1000, DLM2000. For applicable models, refer to this page before purchasing. (Note: Target data for the SL1000 is to be trigger measurement data only.)

*9: OC-1300 series is required. (sold separately)

*10: Supported with the Recording function OSRECO (OSRECO.exe)

Operating Environment

Item	Specification	Remarks
OS	Microsoft Windows^® XP SP2 , Vista (excluding 64 bit version)	.NET Framework 2.0 is to be installed on the system
CPU	Intel ^® Pentium ^®4 2 GHz or higher	Intel ^® Core ^TM processor or higher recommended
Memory	1 GB or more	-
Hard Disk	1 GB or more	-
Display	Capable of display at resolution of 1024 x 768 or above	Recommended 1280 x 1024 or above

** The sufficient specifications for the CPU, memory, and hard disk differ depending on the data size for processing.

* Window ^® 2000,Windows ^® XP, Microsoft ^® Excel are registered trademarks or trademarks of Microsoft Corporation of the U.S.A and other country.

* Intel^® and Pentium^® are registered trademarks of Intel Corporation of the U.S.A and other countries.

* Other company names, product names, and the like are the trademarks of the companies or registered trademarks.

Revised: 2010/11/01