RION Normal incidence acoustic measurement system 9301_9302

Normal incidence sound absorption ratio measurement system by 2-microphone method

Model 9302
Nomal incidence Sound absorption raito measurement system
Model 9301
Normal incidence Sound absorption ratio / Sound transmission loss measurement system

This normal incidence acoustic measurement system captures reflected sound or transmitted sound produced by a source sound hitting a sound absorption material or sound insulation material normally. This is used to measure the sound absorption ratio, acoustic impedance, and related values, as well as the sound during development or review of a material. The system measuring the sound absorption ratio is suitable for measurement of small-size test specimen with a diameter of up to 100mm (108 mm when measuring the sound transmission loss). sound insulation materials for automobiles or buildings, being able to quickly evaluate new materials or laminated materials is a crucial requirement during the development stage. The current system makes it easy to perform such evaluations by determining the physical characteristics of the material.

Normal incidence acoustic measurement system

Model:

9301_9302

Maker:

RION CO.,LTD.

Features

Model 9302 Normal incidence sound absorption ratio measurement system

Determines sound absorption ratio and acoustic impedance related values
of sound absorption material (compliant with JIS A 1405-2 and ISO 10534-2)

Compliant with JIS A 1405-2, ISO 10534-2:1998 (Determination of Sound absorption ratio And Impedance In Impedance Tubes — Part 2: Transfer-function Method)
Transfer function method (2-microphone method) allows instantaneous measurement of sound absorption ratio, reflection coefficient, and surface acoustic impedance
Transfer function method (2-microphone method) allows instantaneous measurement of surface acoustic impedance, characteristic impedance, propagation constant, equivalent sound speed, and equivalent density. Measurement results are used as input data for transfer matrix method prediction software.
Optional transfer matrix method prediction software allows prediction of sound absorption ratio and sound transmission loss for layered materials (up to 5 layers)

Model 9301 Normal incidence sound absorption ratio / Sound transmission loss measurement system

Measures sound absorption ratio and acoustic impedance related values of sound absorption material and normal incidence sound transmission loss of sound insulation material

Includes all functions of the Model 9302 for sound absorption ratio measurement(See information on Model 9320. Calibration tube is also used for sound transmission loss measurement.)
Supports instantaneous measurement of sound transmission loss with 4-microphone method
If sound transmission loss curve comprises resonance characteristics, normal incidence transmission loss estimation software (Option) can be used to estimate the mass law curve

Specifications

Tube Model 9302 Sound absorption ratio measurement System

Standard compliance JIS A 1405-2, ISO 10534-2:1998

	Tube name	Dia. (mm)	Length (mm)
Low frequency measurement range 1/3 oct (125 Hz to 1600 Hz)	Main section	100	645 (620)＊
	Calibration section	100	215
	Measurement section	100	210 to 313
High frequency measurement range 1/3 oct (500 Hz to 6300 Hz)	Main section	29	345 (320)＊
	Calibration section	29	215
	Measurement section	29	210 to 313

＊Linked length

Main tube comprises integrated speakers
Calibration tube comprises internal sound absorption material
Two dummy microphones (plastic) supplied
Test specimen diameter: 100 mm and 29 mm (nominal value)
Test specimen thickness + back air layer: 100 mm max.
(both for low frequency and high frequency system)
Maximum external dimensions when assembled
Model 9302
For low frequency measurement 280 (H) × 150 (W) × 930 (D) mm
For high frequency measurement 280 (H) × 180 (W) × 640 (D) mm
Test specimen supplied with system: 1 each

Result display (Model 9302)

Sound absorption ratio	1/3 octave band analysis, FFT analysis display
Acoustic impedance Z	Absolute value, Phase, Real part, Imaginary part
Reflection coefficient	Absolute value, Phase, Real part, Imaginary part
Surface impedance Z1	Absolute value, Phase, Real part, Imaginary part
Characteristic impedance Zc	Absolute value, Phase, Real part, Imaginary part
Propagation constant r	Attenuation constant α, Phase constant β
CSV format file output	Density p, Sound velocity c, Z1, Zc , r

Tube Model 9301＊ Sound absorption ratio / Sound transmission loss measurement system

＊Includes the functions of the normal incidence sound absorption ratio measurement system (Model 9302)

	Tube name	Dia. (mm)	Length (mm)
Low frequency measurement range	Main section	100	645 (620)＊
	Link section	100 (108)	96 to 116
	Calibration / Measurement section	100	400 (390)＊
	Sound absorption ratio measurement section	100	210
High frequency measurement range	Main section	29	345 (325)＊
	Link section	29 (36)	116 to 156
	Calibration / Measurement section	29	169 (159)＊
	Sound absorption ratio measurement section	29	210 to 313

＊Linked length

Main tube comprises integrated speakers
Calibration / measurement tube comprises internal sound absorption material
Three dummy microphones (plastic) supplied
Test specimen diameter: sound absorption ratio measurement 100 mm and 29 mm, sound transmission loss measurement 108 mm and 36 mm (nominal value)
Sound absorption ratio test specimen thickness + back air layer: 100 mm max. (both for low frequency and high frequency system)
Maximum external dimensions when assembled
Model 9301
For low frequency measurement 280 (H) × 150 (W) × 1130 (D) mm
For high frequency measurement 280 (H) × 180 (W) × 640 (D) mm
Test specimen supplied with system: 1 each

Result display (Model 9301)

Sound absorption ratio	1/3 octave band analysis, FFT analysis display
Acoustic impedance Z	Absolute value, Phase, Real part, Imaginary part
Reflection coefficient	Absolute value, Phase, Real part, Imaginary part
Surface impedance Z1	Absolute value, Phase, Real part, Imaginary part
Characteristic impedance Zc	Absolute value, Phase, Real part, Imaginary part
Propagation constant r	Attenuation constant α, Phase constant β
CSV format file output	Density p, Sound velocity c, Z1, Zc, r
Sound transmission loss	1/3 octave band analysis, FFT analysis display

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