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Operating Deflection Shapes (ODS) Analysis

Nuclear power plant after sunset. Dusk landscape with big chimneys.

Mobility Testing

In mobility testing, accelerance, mobility and compliance functions are calculated. For structures with well-separated modes, estimation of natural frequencies and damping ratios is possible. Often done during troubleshooting using hammer testing.

rail illustration outline

Operating Deflection Shapes (ODS) Analysis

A versatile application for determining the vibration patterns of machinery and structures under various operating conditions such as engine speed and ambient forces. Our ODS systems guide you through the entire measurement and analysis process.

rail illustration outline

Operating Deflection Shapes (ODS) Analysis

A versatile application for determining the vibration patterns of machinery and structures under various operating conditions such as engine speed and ambient forces. Our ODS systems guide you through the entire measurement and analysis process.

Operating Deflection

Operating Deflection Shapes (ODS) Analysis

A versatile application for determining the vibration patterns of machinery and structures under various operating conditions such as engine speed and ambient forces. Our ODS systems guide you through the entire measurement and analysis process.

Mobility Testing

Mobility Testing

A versatile application for determining the vibration patterns of machinery and structures under various operating conditions such as engine speed and ambient forces. Our ODS systems guide you through the entire measurement and analysis process.

rail illustration outline

Operating Deflection Shapes (ODS) Analysis

A versatile application for determining the vibration patterns of machinery and structures under various operating conditions such as engine speed and ambient forces. Our ODS systems guide you through the entire measurement and analysis process.

rail illustration outline

Operating Deflection Shapes (ODS) Analysis

A versatile application for determining the vibration patterns of machinery and structures under various operating conditions such as engine speed and ambient forces. Our ODS systems guide you through the entire measurement and analysis process.

rail illustration outline

Operating Deflection Shapes (ODS) Analysis

A versatile application for determining the vibration patterns of machinery and structures under various operating conditions such as engine speed and ambient forces. Our ODS systems guide you through the entire measurement and analysis process.

rail illustration outline

Operating Deflection Shapes (ODS) Analysis

A versatile application for determining the vibration patterns of machinery and structures under various operating conditions such as engine speed and ambient forces. Our ODS systems guide you through the entire measurement and analysis process.

Operating Deflection

Operating Deflection Shapes (ODS) Analysis

A versatile application for determining the vibration patterns of machinery and structures under various operating conditions such as engine speed and ambient forces. Our ODS systems guide you through the entire measurement and analysis process.

rail illustration outline

Operating Deflection Shapes (ODS) Analysis

A versatile application for determining the vibration patterns of machinery and structures under various operating conditions such as engine speed and ambient forces. Our ODS systems guide you through the entire measurement and analysis process.

mechanic checking the motor of a car

Operating Deflection Shapes (ODS) Analysis

A versatile application for determining the vibration patterns of machinery and structures under various operating conditions such as engine speed and ambient forces. Our ODS systems guide you through the entire measurement and analysis process.

engineer with glasses working on the computer with two screens showing the durability simulation and analysis software tools

Mobility Testing

In mobility testing, accelerance, mobility and compliance functions are calculated. For structures with well-separated modes, estimation of natural frequencies and damping ratios is possible. Often done during troubleshooting using hammer testing.

TYPE 4989-A

1/4" PRODUCTION LINE TEST MICROPHONE

Pressure-field production line test microphone for cost effective and precise measurements close to sound ports in production testing.

TYPE 4989-A

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Microphone Type 4989-A is a 20 kHz 1/4" pressure-field all titanium microphone with a laser-welded diaphragm. The microphone is assembled in clean room to ensure its integrity and the validity of the TEDS data. This results in superior robustness and long-term stability.

Type 4989-A is designed to ensure minimal variation between individual microphones, maximum resistance to corrosion and minimum sensitivity to magnetic fields, with the microphone capsule and preamplifier housing made of titanium, and it is fitted with a gold-plated brass connector. The microphone is virtually unaffected by temperature, static pressure and humidity changes, making it the ideal microphone for integration in production test systems in locations where temperature and humidity can vary.

USE SCENARIOS

Measurements close to sound ports of an audio device (near field)
Production test systems
Measurements where consistency between microphone is crucial
Measurements where temperature and humidity can vary
Measurements requiring an EMC-compliant product (EN/IEC 61326)

1/4-inch Production Line Test Microphone Type 4989-A

Data Sheets

English

TYPE 4989-A
Sound field	Special
Polarization	CCLD
Sensitivity	9 mV/Pa
Lower frequency	5 Hz
Higher frequency	20 kHz
Lower dynamic range	30 dB
Higher dynamic range	140 dB
Diameter	1/4 inch
Venting	Side
Minimum Temperature	-20 °C
Maximum Temperature	60 °C
Minimum Temperature	-4 °F
Maximum Temperature	140 °F
Output signal (connectivity)	Passive

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This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.