This product has been discontinued. DS-0323 will be the successor

Real-time 1/1, 1/3 Octave Analysis Software


2 ch/4 to 8 ch/10 to 32 ch

Replaces with DS-0223 Sereis

Supported Hardware

Data display (Example of noise measurement of arterial highway

Example of noise measurement of arterial highway

Blue: Equivalent Continuous Sound Pressure Level (Leq)
Green: Single-shot Sound Exposure Level (Lae)




This software can perform 1/1 or 1/3 real-time octave band analysis from 2 to 32 channels at the frequency range of 0.5 to 20kHz. DS-0223VA is available for 2-ch, DS-0223WA is for 4 to 8-ch, and DS-0223XA is for 10 to 32-ch. Sound filter conforms to IEC, JIS and ANSI.


By setting the measurement time, Equivalent Continuous Sound Pressure Level and Single-shot Sound Exposure Level can be calculated simultaneously. Also, it can be recorded level fluctuation of each band (time-series) at maximum 2,000 points. Using those data, Percentile Sound Pressure Level for each band can be calculated. Operating system is Windows XP / VISTA/ 7 . Based on this software, the function can be expanded with optional software DS-0224A, 1/6, 1/12, 1/24 real-time octave analysis and DS-0243A, rotation-tracking analysis by real-time octave band.


Equivalent Continuous Sound Pressure Level: An average value which is obtained by dividing t-hour (s) of total level by t. Single-shot Sound Exposure Level: A value as converted t-hour (s) of level to one-minute of level.

What is Real-time octave analysis

When noise control countermeasure is taken, frequency analysis is required. Octave analysis has been used as one of the way for noise analysis. Octave represents the ratio of frequency is 1 to 2, that means 2 times of frequency. Feeling of human hearing has characteristics in equal ratio which respects to the frequency. In view of this feature, octave-band series is standardized based on the frequency at 1kHz. The sound pressure of each band is obtained through the standardized band-pass filter. The octave-band based on the frequency at 1kHz is called 1/1 octave-band, and then further division to three of 1/1 octave-band is called 1/3 octave-band.


Data example

Example of sound level trend (time history level) of excavator

Data display (Example of sound level trend (time history level) of excavator)


Red:All pass (total level)


Example of level trend by 3D mapping display

Data display (Example of level trend by 3D mapping display)



Example of Percentile Sound Pressure Level at arterial highway (Lx)

Data display (Example of Percentile Sound Pressure Level at arterial highway  (Lx))

Display for L5 to L95, Lmax, Lmin, Lavg of each 1/3 octave-band with 2D graph

*Percentile Sound Pressure Level: It indicates the percentage of level in t-time. L50 is called central value,

which is the middle value counted from maximum level.


(1) Input section

Number of channels 32 channels at maximum (simultaneous processing)
Input impedance 1 MΩ / approx. 120 pF
Input voltage range Applied every 10 dB, in 6 steps
Input connector BNC voltage input, Applicable to CCLD 2 mA, 4 mA
Frequency weighting A, B, C, FLAT (conforming to IEC 651 Type 0), analog filter
Sensitivity setting Settable for each channel (calibration function)

(2) Filter and detection section

Calculation method All digital calculation method (Digital filter and Digital RMS)
A/D conversion 24 bit, 64 kHz sampling
Dynamic range 85dB or more
Filter type 6th Butterworth
Conforming standards (Filter) JIS C 1514-2002 Class 1
IEC 61260 Ed.1.0 (1995) Class 1
ANSI S1.11-2004 Class 1
Frequency range 0.5 Hz to 20 kHz (1/3 OCT)
1.0 Hz to 16 kHz (1/1 OCT)
Time constant 10 ms, 35 ms, FAST (125 ms), 630 ms, SLOW (1 s), 8 s, IMPULSE

(3) Measurement section

Measurable physical characteristics of sound Sound pressure level for each band
Sound pressure level of band composition (OVERALL)
Sound pressure level of FLAT (ALLPASS)
Basic measurement INST (Instantaneous value), MAX (Maximum value for each second)
MAX.H (Band maximum value within the measurement time for power operation data)
MIN.H (Band minimum value within the measurement time for power operation data)
P AVG (Average value of instantaneous values within the measurement time for power operation data, which is equivalent to the equivalent sound level)
P SUM (Value obtained by converting the sum of instantaneous values within the specified measurement time for power operation data into the average power level for each second. Equivalent to the single-shot sound exposure level.)
Second processing Lx (L1, L5, L10, L50, L90, L95, L99)
Differential function(Difference of dB value, difference of antilog value (background noise correction)
Level trend function(Plotting the graph showing level changing in arbitrary band, second processing after memorized)

(4) Display section

Display format Bar graph display (Allband+Allpass+Overall)
Monitor display (Time trend monitor display)
List display (Allband+Allpass+Overall)
Level trend display (from continuous recording band data)
3D/2D level trend display (color)

(5) Memory section

Memory capacity 2000 blocks/ch, Continuous recording of INST data (level trend function)
Recording interval 1 ms to 10 s (valiable)
Number of saving data Up to 500 data items can be saved
Address for storing data Can be stored to arbitrary folder with arbitrary file name.

(6)Data input/output function

Analysis condition file Open/save of arbitrary measurement condition file
Print function of data Print function by installing of printer driver
Copy function of data Pasting data on clipboard at text or bitmap format

Applications for real-time octave analysis


(1) Analysis for noise characteristic in automobile cabin
(2) Analysis for sound pressure characteristic of acoustic product
(3) Testing for noise from compressor
(4) Testing for noise from exterior unit for air conditioner
(5) Analysis for low-frequency sound
(6) Measurement for environmental noise and vibration
(7) Measurement for traffic noise
(8) Measurement for vibration of handheld tool




Copyright © ONO SOKKI CO.,LTD All Rights Reserved. | Terms of use | Privacy policy