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Overview of sound measurement and related products

Overview of sound measurement and related products

Ono Sokki provides various acoustic measurement and analysis products such as a microphone, a sound intensity probe, a sound level meter and other measurement and analysis systems which are used for capturing sound flow, detecting sound and environmental noise, or sound evaluation etc. We can offer a total system related acoustic measurement and analysis.

MI series1/2-inch measurement back electret-type microphone

Microphones
Sound Intensity Probe
Sound Level Meters
Related Products

Microphones

1/2-inch Measurement microphone

MI-1271

1/2-inch Microphone

MI-1235 1/2-inch Microphone

MI-1433 1/2-inch Microphone

MI-1531
1/4-inch
Microphone

Feature

・1/2-inch
・Corresponds to high sensitivity and low frequency
・Withstand a severe temperature environment

Feature

・1/2-inch
・Corresponds to audible range
・High cost performance

Feature

・1/2-inch

・Low-cost
・Effective for environmental measurement

Feature

・1/4-inch
・Wide frequency range measurement (up to 100 kHz)
・Ideal for space saving

Overview Specification

Response type

Free sound field

Polarization method

Back electrets type

Positive voltage

0 V

Sensitivity

-26 dB±1.5 dB re. 1 V/Pa

50 mV/Pa (1 kHz)

Capacitance (1 kHz)

12 pF

(representative value)

Frequency range

(1 kHz standard)

1 Hz to 20 kHz (±2 dB)

Effective load volume

359 mm³

Maximum sound pressure level (Total harmonic distortion 3%)

135 dB

（when using MI-3170）

Intrinsic noise level

(A-weighting)

14.0 dB

(representative value)

(when using MI-3170)

Static pressure characteristics

（at 250 Hz）

-0.013 dB/kPa (representative value)

Temperature characteristics

（at 250 Hz）

-0.005 dB/K (representative value)

Humidity characteristics

（at 250 Hz）

+0.0004 dB/% (representative value)

Operating temperature range

-30 to +80 ℃

Operating relative humidity range

0 to 90%

(with no condensation)

Storage temperature range

-40 to +70 ℃

Storage relative humidity range

0 to 90% (with no condensation)

Weight

Approx. 6 g

Outer dimension

φ13.2 mm×16.9 mm

Overview Specification

Response type

Free sound field

Polarization method

Back electrets type

Positive voltage

0 V

Sensitivity

-29±3 dB re. 1 V/Pa 36 mV/Pa (1 kHz)

Capacitance (1 kHz)

13 pF

(representative value)

Frequency range

(1 kHz standard)

10 Hz to 20 kHz
(+1.5 dB, -5 dB)
10 Hz to 10 kHz
(+1.5 dB, -2 dB)

Effective load volume

260 mm³

Maximum sound pressure level (Total harmonic distortion 3%)

135 dB

(when using MI-3111）
141 dB

(when using MI-3170)

Intrinsic noise level

(A-weighting)

19.0 dB

(representative value)
(when using MI-3111)

Static pressure characteristics

（at 250 Hz）

-0.03 dB/kPa or less

Temperature characteristics

（at 250 Hz）

+0.009 dB/K or less

Humidity characteristics

（at 250 Hz）

-0.001 dB/% or less

Operating temperature range

-10 to +50 ℃

Operating relative humidity range

20 to 90% (with no condensation)

Storage temperature range

-20 to +60 ℃

Storage relative humidity range

10 to 90% (with no condensation)

Weight

Approx. 6 g

Outer dimension

φ13.2 mm×13.7 mm

Overview Specification

Response type

Free sound field

Polarization method

Back electrets type

Positive voltage

0 V

Sensitivity

-29±3 dB re. 1 V/Pa 36 mV/Pa (1 kHz)

Capacitance (1 kHz)

13 pF

(representative value)

Frequency range

(1 kHz standard)

20 Hz to 8 kHz
(±2 dB)

Effective load volume

239 mm³

Maximum sound pressure level (Total harmonic distortion 3%)

135 dB

(when using MI-3111）
141 dB

(when using MI-3170)

Intrinsic noise level

(A-weighting)

19.0 dB

(representative value)
(when using MI-3111)

Static pressure characteristics

（at 250 Hz）

-0.03 dB/kPa or less

Temperature characteristics

（at 250 Hz）

+0.009 dB/K or less

Humidity characteristics

（at 250 Hz）

-0.001 dB/% or less

Operating temperature range

-10 to +50 ℃

Operating relative humidity range

20 to 90% (with no condensation)

Storage temperature range

-20 to +60 ℃

Storage relative humidity range

10 to 90% (with no condensation)

Weight

Approx. 6 g

Outer dimension

φ13.2 mm×13.5 mm

Overview Specification

Response type

Free sound field

Polarization method

Back electrets type

Positive voltage

0 V

Sensitivity

-48±3 dB re. 1 V/Pa
4 mV/Pa (250 Hz)

Capacitance (1 kHz)

7 pF

(representative value)

Frequency range

(1 kHz standard)

10 Hz to 100 kHz
(+2 dB, -4 dB)
10 Hz to 40 kHz
(±2 dB)

Effective load volume

54 mm³

Maximum sound pressure level (Total harmonic distortion 3%)

157 dB

(when using MI-3140)

Intrinsic noise level

(A-weighting)

30.0 dB (representative value)

Static pressure characteristics

（at 250 Hz）

-0.008 dB/kPa

(representative value)

Temperature characteristics

（at 250 Hz）

+0.01 dB/K (representative value)

Humidity characteristics （at 250 Hz）

-0.001 dB/%

(representative value)

Operating temperature range

-30 to +60 ℃

Operating relative humidity range

0 to 90% (with no condensation)

Storage temperature range

-30 to +80 ℃

Storage relative humidity range

0 to 90% (with no condensation)

Weight

Approx. 1.5 g

Outer dimension

φ6.9 mm×10.5 mm

Applicable preamplifier

MI-3170

Applicable preamplifier

MI-3111

Applicable preamplifier

MI-3111

Applicable preamplifier

MI-3140

↑ Click the each model for details.

Preamplifier

MI-3170
1/2-inch

Preamplifier

MI-3111
1/2-inch
Preamplifier

MI-3140
1/4-inch
Preamplifier

Feature

・1/2-inch

・Withstand a severe temperature environment

・Effective for low frequency sound and micro small sound

Feature

・1/2-inch

・High cost performance

・Effective for multi-channel measurement

Feature

・1/4-inch

・Ideal for space saving

・Supports wide frequency range

Overview Specification

Insertion loss

0.15 dB (representative value)

Frequency range

10 Hz to 40 kHz
(±1.0 dB, -0.2 dB, 1 kHz as reference）
1 Hz to 40 kHz
(±1.0 dB, -1.5 dB, 10 kHz as reference）

Intrinsic noise （effective value）

A-weighting: 3.3 μV or less

Total harmonic distortion （at 1 kHz）

0.0316% or less

（input effective voltage 1 V）

Overview Specification

Insertion loss

1.0 dB（representative value）

Frequency range

10 Hz to 20 kHz
（±1.0 dB, 1 kHz as reference）
20 Hz to 20 kHz
（±0.6 dB, 1 kHz as reference）

Intrinsic noise （effective value）

A-weighting: 5.0 µV or less

Total harmonic distortion （at 1 kHz）

1% or less
（input effective voltage 3 V）

Overview Specification

Insertion loss

0.25 dB（representative value）

Frequency range

10 Hz to 100 kHz
（±0.5 dB or less, 1kHz as reference）

Intrinsic noise （effective value）

A-weighting: 2.5 µV or less

Total harmonic distortion （at 1 kHz）

3% or less

（input effective voltage 8 V）

DC bias voltage

12 V ± 2 V

Maximum output voltage

±8 V （peak）
Sound pressure conversion 135 dB

Operating temperature range

-30 to +80 ℃

Operating relative humidity range

0 to 90%RH (with no condensation)

Storage temperature range

-40 to +70 ℃

Storage relative humidity range

0 to 90%RH (with no condensation)

Power supply

CCLD
2 to 4.5 mA, 18 to 26 VDC

Applicable connector

CO2 (BNC)

Weight

Approx. 35 g

（not including microphone）

Outer dimension

φ12.7×80.5 mm

Accessory

Protection cap for input connector×1

Microphone holder (MI-0301)×1

Extension cable

MX-1000 series (recommended)

MX-2000 series

DC bias voltage

8 V ± 1 V

Maximum output voltage

±5.6 (peak)

(driving power: 24VDC, 4mA)

Sound pressure conversion 135 dB

Operating temperature range

-10 to +50 ℃

Operating relative humidity range

30 to 90 ％RH

（with no condensation）

Storage temperature range

-20 to +60 ℃

Storage relative humidity range

10 to 90 ％RH（with no condensation）

Power supply

CCLD
0.5 to 5 mA, 15 to 25 VDC

Applicable connector

CO2(BNC)

Weight

Approx. 25 g

（not including microphone）

Outer dimension

φ12.7×63.5 mm

Accessory

Protection cap for input connector×1

Microphone holder (MI-0301)×1

Extension cable

MX-2000 series (recommended)

DC bias voltage

12 V （representative value）

Maximum output voltage

±8 V （peak）

(driving power: 24VDC, 4mA)
Sound pressure conversion 157 dB
(MI-1531 sensitivity: -48 dB re. 1V/Pa)

Operating temperature range

-30 to +60 ℃

Operating relative humidity range

0 to 90 ％RH（with no condensation）

Storage temperature range

-30 to +80 ℃

Storage relative humidity range

0 to 95 ％RH（with no condensation）

Power supply

CCLD
2 to 20 mA, 15 to 25 VDC

Applicable connector

10-32 UNF

Weight

Approx. 5.5 g

（not including microphone）

Outer dimension

φ6.35×44 mm

Accessory

Protection cap for input connector×1

1/4-inch conversion adapter

(SC-0313)×1

Extension cable

NP-0130 series (recommended)

Applicable Microphone

MI-1271
MI-1235
MI-1433
MI-1234*
MI-1233*
MI-1432*
MI-1431*

Applicable Microphone

MI-1235
MI-1433
MI-1234*
MI-1433*
MI-1432*
MI-1431*

Applicable Microphone

MI-1531

*:Discontinued products

Directional Microphone

Sensor Amplifier

MI-8100
Directional Microphone

SR-2210
2ch Sensor Amplifier

Feature

The MI-8100 is a shotgun type directional microphone which sharply catches the intended sound. This is helpful for the removal of background noise in the simple exploration and in abnormal sound detection.

Feature

The SR-2210 sensor amplifier accepts constant-current line drive sensors and connects the signal to analyzers and recorders that would not otherwise be compatible with constant-current sensors. Dual power source: battery or AC adaptor (optional) Stackable for multiple channels.

Overview Specification

Directivity

Narrow angle directivity

Frequency range

50 Hz to 20 kHz

Sensitivity

-30 dB ± 3 dB

Maximum sound pressure

137 dB

Intrinsic noise level

26 dB or less

Accessory

Wind screen

Overview Specification

Frequency range

1 Hz to 20 kHz load impedance 100 kΩ or more

Gain

-10 to 60 dB
(8 stages selectable in 10 dB steps, ± 0.2 dB)

Input impedance

1 MΩ ± 0.5%

Intrinsic noise level

-105 dBVrms or less (A),
-100 dBVrms or less (C),
-95 dBVrms or less (FLAT)

Input cutoff frequency

Approx. 0.16 Hz

Input voltage

maximum 12.5 dBVrms (± 6 V)

Frequency compensation

A, C, FLAT

Output cutoff frequency

Approx. 0.2 Hz (load impedance 100 kΩ or more)
Approx. 0.4 HZ (load impedance 50 kΩ or more)

Output voltage

maximum 12.6 dBVrms (± 6 V)

Recommended configuration

BL-1100 Acoustic Vibration Monitor

Applicable microphone, preamplifier, cable

Microphone	Preamplifier	Cable/conversion connector	Amplifier
MI-1234* MI-1235 MI-1432* MI-1433	MI-3111	MX-100 series	SR-2200 AU-2200*
MI-1531	MI-3140	NP-0130 +NP-0021	SR-2200 AU-2200*
MI-1211	MI-3310	AG-3300 series	AU-2200*
MI-1234* MI-1235 MI-1432* MI-1433	MI-3310	AG-3300 series	AU-2200*

↑ Click the each model for details.

※Discontinued product

Sound Intensity Probe

Sound intensity probe

MI-5420
Sound Source Visualization Probe Microphone

MI-6420
3-D Sound Intensity Probe

Feature

MI-5420 is probe microphone to visualize sound source with a minimum number of microphones by using Beam Forming and originally developed calculation method. Compact design of approx. 35 cm allows ease of use and good portability. Two types of probe head (for low frequency and high frequency) are provided to meet demands for wide frequency range measurement. As 500 Hz to 8000 Hz of frequency is supported by two probe heads, you can select either depending on your needs.

Feature

Four microphones are placed in each apex of a regular tetrahedron and unique to Ono Sokki. Calculate sound intensity of any two microphone pairs (six ways) in four microphones, and then determine the three-dimensional sound intensities by calculating components along the X, Y, and Z axes of the microphone probe.

Overview Specification

Probe structure

3D arranged tetrahedral microphone

Microphone type

1/4-inch microphone

Sound pressure sensitivity

−38 dB ± 3 dB

Sound pressure level

Max. 110 dB （1 kHz, THD 3 ％）

Temperature coefficient

0.1 dB / 10 ℃（TYP）

Gap between microphones

For low-frequency: 120 mm
For high-frequency: 60 mm

Measurable frequency range

For low-frequency: 500 Hz to 4 kHz
For high-frequency: 1 kHz to 8 kHz

Accessories

Carrying case, microphone position checking plate, BNC cable (0.2 m), BNC-JPJ adapter, mount, correction file CD, instruction manual

Overview Specification

Probe structure

Tetrahedron 4-microphone three-dimensional arrangement

Microphone type

1/4-inch Back electret-type condenser microphone

Sound pressure sensitivity

-17 dB ± 3 dB

Sound pressure level

Min. 32 dB (A), 40 dB (F)
Max. 125 dB (1 kHz, THD 3 %)

Temperature coefficient

0.1 dB / 10°C (TYP)

Gap between microphones

For low-frequency: 60 mm
For high-frequency: 20 mm

Measureable frequency range

For low-frequency: 40 Hz to 1.2 kHz (-1 ± 1 dB)
For high-frequency: 120 Hz to 3.6 kHz (-1 ± 1 dB) to 5 kHz (-2 ± 1 dB)

Shortest distance between measuring object and acoustic center

For low-frequency: approx. 40 mm
For high-frequency: approx. 14 mm

Accessories

Connection cable: 5 m
Adapter (for 60 mm, for 20 mm)
Storage case

Applicable microphone amplifier

CF-0610 4ch

Applicable Calibrator

MI-0620 Sound pressure phase calibrator

↑ Click the each model for details.

Sound Level Meters

Classification list of Sound Level Meter

（PDF 2 pages 380 KB）

Integrating sound level meter

LA-1411 Class2

LA-1441 Class2

LA-4441 Class1

Feature

● Integrating sound level meter (Class 2) for product testing and measuring the sound level generated from machines etc.
● High-performance and cost-effective model

Feature

● Integrating sound level meter (Class 2) for measuring the working environment and environmental noise
● Auto measurement function by timer and trigger
● Level trend can be recorded at the interval from 1ms. (L_p memory function)
● Equipped with USB and RS-232C interfaces

Feature

● Precision integrating sound level meter (Class 1) for sound analysis and product testing.
● Time weighting (10ms, Impulse) corresponding to the fast sound fluctuation.
● Level trend can be recorded at the interval from 1ms. (L_p memory function)
● Equipped with USB and RS-232C interfaces

Overview Specification

Applying standard

JIS C 1509-1:2005 Class 2
IEC 61672-1:2002 Class 2

Microphone

1/2-inch back electret condenser microphone MI-1433
Nominal sensitivity level: -29 dB

Preamplifier

MI-3111

Linearity range

100 dB (wide range)

80 dB (normal range)

Frequencyrange

10 Hz to 8 kHz (JIS, IEC)

Measurement level range

A: 26 dB to 135 dB (JIS, IEC)
C: 31 dB to 135 dB (JIS, IEC)
Z: 36 dB to 135 dB (JIS, IEC)

Frequency weighting

A, C and Z

Intrinsic noise

A: 15 dB or less
C: 17 dB or less
Z: 25 dB or less

Level range

20 to 90 dB, 30 to 90 dB, 40 to 100 dB, 50 to 110 dB, 60 to 120 dB, 70 to 130 dB, 40 to 120 dB (wide range)

Time weighting

FAST, SLOW

Measurement items

L_p, L_eq, L_E, L_max, L_min, L_peak, L_N(L_high, L₅, L₁₀, L₅₀, L₉₀, L₉₅, L_low, L_ave)

Level trend

L_p, every kind of calculated value

Sampling frequency

31.25 µs (other than L_N) 100ms (L_N)

Measurement (calculation) time

Manual, arbitrary setup (199 h 59 m 59 s max.)

Total measurement time

–

Start mode

Manual

Internal refernce signal (REF OUT)

Electrical calibration by internal calibration signal (1 kHz sine wave), calibration by external sound calibrator

Recommended sound calibrator

SC-2500/SC-3120/SC-2120A

Manual memory function

Total calculated values: 100 addresses

Auto memory function

–

L_p Record memory function

–

Measurement condition memory function

Condition memories (9 kinds)

Resume function

Settings activated at power ON can be selected from follows; settings used at previous power OFF, factory setting, and any condition memory number which is set from menu.

AC output

0.707 Vrms/F.S (normal range),
2.236 Vrms/F.S. (wide range),
load resistance 10 Ω or more
(with upper-limitation value of bar indicator)
Frequency weighting can be selected: conjunction with selected frequency weighting or fixed to Z-weighting.

DC output

2.5 V/F.S.
(with upper-limitation value of bar indicator)
Amount of voltage fluctuation per 10 dB: 0.25 V
Load resistance: 10 kΩ or more

Overview Specification

Applying standard

JIS C 1509-1:2005 Class 2
IEC 61672-1:2002 Class 2

Microphone

1/2-inch back electret condenser microphone MI-1433
Nominal sensitivity level: -29 dB

Preamplifier

MI-3111

Linearity range

100 dB (wide range)

80 dB (normal range)

Frequencyrange

10 Hz to 8 kHz (JIS, IEC)

Measurement level range

A: 26 dB to 135 dB (JIS, IEC)
C: 31 dB to 135 dB (JIS, IEC)
Z: 36 dB to 135 dB (JIS, IEC)

Frequency weighting

A, C and Z

Intrinsic noise

A: 15 dB or less
C: 17 dB or less
Z: 25 dB or less

Level range

20 to 90 dB, 30 to 90 dB, 40 to 100 dB, 50 to 110 dB, 60 to 120 dB, 70 to 130 dB, 40 to 120 dB (wide range)

Time weighting

FAST, SLOW

Measurement items

L_p, L_eq, L_E, L_max, L_min, L_peak, L_N(L_high, L₅, L₁₀, L₅₀, L₉₀, L₉₅, L_low, L_ave)

Level trend

L_p, every kind of calculated value (Read out the displayed value as auto memory call)

Sampling frequency

31.25 µs (other than L_N) 100ms (L_N)

Measurement (calculation) time

Manual, arbitrary setup (199 h 59 m 59 s max.)

Total measurement time

Arbitrary setup (199 h 59 m 59 s max.)

Start mode

Manual, timer (time setting, in increment of 1 second), trigger (can be started after a lapse of specified time [0 to 10 seconds, in increment of 1 minute] after trigger detection: trigger delay function)

Internal refernce signal (REF OUT)

Electrical calibration by internal calibration signal (1 kHz sine wave), calibration by external sound calibrator

Recommended sound calibrator

SC-2500/SC-3120/SC-2120A

Manual memory function

Total calculated values: 100 addresses

Auto memory function

L_eq: 1000 addresses × 200 blocks
Total calculated values: 100 addresses × 200 blocks

L_p Record memory function

Sound level with time weighting is stored at the specified interval. (1000 address × 200 blocks)
Storing intervals (1 ms, 2 ms, 5 ms and 10 ms)

Measurement condition memory function

Condition memories (9 kinds)

Resume function

Settings activated at power ON can be selected from follows; settings used at previous power OFF, factory setting, and any condition memory number which is set from menu.

AC Output

DC output

2.5 V/F.S.
(with upper-limitation value of bar indicator)
Amount of voltage fluctuation per 10 dB: 0.25 V
Load resistance: 10 kΩ or more

RS-232C

Control of operation, data output, print out (to the DPU-414 printer)
Baud rate:9,600/115,200 bps

USB

Control of main unit and data output,
USB2.0 FULL SPEED (connecting virtual COM port)

Overview Specification

Applying standard

JIS C 1509-1:2005 Class 1
IEC 61672-1:2002 Class 1

Microphone

1/2-inch back electret condenser microphone MI-1235
Nominal sensitivity level: -29 dB

Preamplifier

MI-3111

Linearity range

100 dB (wide range)

80 dB (normal range)

Frequencyrange

10 Hz to 20 kHz (JIS, IEC)

Measurement level range

A: 27 dB to 135 dB (JIS, IEC)
C: 30 dB to 135 dB (JIS, IEC)
Z: 35 dB to 135 dB (JIS, IEC)

Frequency weighting

A, C and Z

Intrinsic noise

A: 16 dB or less
C: 17 dB or less
Z: 24 dB or less

Level range

20 to 90 dB, 30 to 90 dB, 40 to 100 dB, 50 to 110 dB, 60 to 120 dB, 70 to 130 dB, 40 to 120 dB (wide range)

Time weighting

FAST, SLOW, IMPULSE, 10 ms

Measurement items

L_p, L_eq, L_E, L_max, L_min, L_peak, L_N(L_high, L₅, L₁₀, L₅₀, L₉₀, L₉₅, L_low, L_ave)

Level trend

L_p, every kind of calculated value (Read out the displayed value as auto memory call)

Sampling frequency

20.8 µs (other than L_N) 100ms (L_N)

Measurement (calculation) time

Manual, arbitrary setup (199 h 59 m 59 s max.)

Total measurement time

Arbitrary setup (199 h 59 m 59 s max.)

Start mode

Manual, timer (time setting, in increment of 1 second), trigger (can be started after a lapse of specified time [0 to 10 seconds, in increment of 1 minite] after trigger detection: trigger delay function)

Internal refernce signal (REF OUT)

Electrical calibration by internal calibration signal (1 kHz sine wave), calibration by external sound calibrator

Recommended sound calibrator

SC-2500/SC-3120

Manual memory function

Total calculated values: 100 addresses

Auto memory function

L_eq: 1000 addresses × 200 blocks
Total calculated values: 100 addresses × 200 blocks

L_p Record memory function

Sound level with time weighting is stored at the specified interval. (1000 address × 200 blocks)
Storing intervals (1 ms, 2 ms, 5 ms and 10 ms)

Measurement condition memory function

Condition memories (9 kinds)

Resume function

Settings activated at power ON can be selected from follows; settings used at previous power OFF, factory setting, and any condition memory number which is set from menu.

AC Output

DC output

2.5 V/F.S.
(with upper-limitation value of bar indicator)
Amount of voltage fluctuation per 10 dB: 0.25 V
Load resistance: 10 kΩ or more

RS-232C

Control of operation, data output, print out (to the DPU-414 printer)
Baud rate:9,600/115,200 bps

USB

Control of main unit and data output,
USB2.0 FULL SPEED (connecting virtual COM port)

↑ Click the each product for more details.