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BRUEL & KJAER 4189 User Manual

BRUEL & KJAER 4189
219 pages
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Brüel&Kjær
B
K
BA 5105 12
Technical
Documentation
WORLD HEADQUARTERS: DK-2850 rum • Denmark
Telephone: +4542800500 Telex: 37316 bruka dk • Fax: +4542801405
e-mail: info@bk.dk • Internet: http://www.bk.dk
Microphone Handbook
For the Falcon™ Range of Microphone Products

Table of Contents

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BRUEL & KJAER 4189 Specifications

General IconGeneral
Sensitivity50 mV/Pa
Polarization Voltage0 V
Diameter12.7 mm (1/2 inch)
Output Impedance50 ohms
Humidity Range0 to 90 %RH

Summary

Chapter 1 Introduction

1.4 The Preamplifiers

Introduces the 1/2" Microphone Preamplifier Type 2669 and Type 2671 for acoustic measurements.

Chapter 2 Prepolarized Free-field 1/2" Microphone Type 4188

2.2 Sensitivity

Discusses the open-circuit and loaded sensitivity of the microphone.

2.2.1 Open-circuit Sensitivity

Defines and presents the nominal open-circuit sensitivity of the Type 4188 microphone.

2.2.2 Loaded Sensitivity

Provides the formula for calculating loaded sensitivity with a preamplifier.

2.3 Frequency Response

Details the frequency response characteristics of the microphone.

2.3.2 Optimized Response (0°-incidence Free-field Response)

Shows the typical free-field response curve and its specified tolerances.

2.3.3 Actuator Response

Explains how actuator response is used to determine frequency response.

2.3.4 Low-frequency Response

Describes the low-frequency response characteristics and conditions.

2.3.5 Free-field Response

Presents free-field correction curves and typical responses at different incidence angles.

2.4 Directional Characteristics

Shows typical directional characteristics at various frequencies.

2.5 Dynamic Range

Defines and discusses the dynamic range, including inherent noise.

2.10 Stability

Covers the mechanical and high-temperature stability of the microphone.

2.10.1 Mechanical Stability

Describes the microphone's improved mechanical stability and resistance to shocks.

2.10.2 High-temperature Stability

Details the stability of the diaphragm and sensitivity at high temperatures.

2.11 Effect of Temperature

Explains how temperature affects the microphone's performance and design considerations.

2.12 Effect of Ambient Pressure

Details how ambient pressure variations affect sensitivity and frequency response.

2.17 Specifications Overview

Provides a summary of the key technical specifications for the Type 4188.

Chapter 3 Prepolarized Free-field 1/2" Microphone Type 4189

3.2 Sensitivity

Discusses the open-circuit and loaded sensitivity of the microphone.

3.2.1 Open-circuit Sensitivity

Defines and presents the nominal open-circuit sensitivity of the Type 4189 microphone.

3.2.2 Loaded Sensitivity

Provides the formula for calculating loaded sensitivity with a preamplifier.

3.3 Frequency Response

Details the frequency response characteristics of the microphone.

3.3.2 Optimized Response (0°-incidence Free-field Response)

Shows the typical free-field response curve and its specified tolerances.

3.3.3 Actuator Response

Explains how actuator response is used to determine frequency response.

3.3.4 Low-frequency Response

Describes the low-frequency response characteristics and conditions.

3.3.5 Free-field Response

Presents free-field correction curves and typical responses at different incidence angles.

3.4 Directional Characteristics

Shows typical directional characteristics at various frequencies.

3.5 Dynamic Range

Defines and discusses the dynamic range, including inherent noise.

3.10 Stability

Covers the mechanical and high-temperature stability of the microphone.

3.10.1 Mechanical Stability

Describes the microphone's improved mechanical stability and resistance to shocks.

3.10.2 High-temperature Stability

Details the stability of the diaphragm and sensitivity at high temperatures.

3.11 Effect of Temperature

Explains how temperature affects the microphone's performance and design considerations.

3.12 Effect of Ambient Pressure

Details how ambient pressure variations affect sensitivity and frequency response.

3.17 Specifications Overview

Provides a summary of the key technical specifications for the Type 4189.

Chapter 4 Free-field 1/2" Microphone Type 4190

4.2 Sensitivity

Discusses the open-circuit and loaded sensitivity of the microphone.

4.2.1 Open-circuit Sensitivity

Defines and presents the nominal open-circuit sensitivity of the Type 4190 microphone.

4.2.2 Loaded Sensitivity

Provides the formula for calculating loaded sensitivity with a preamplifier.

4.3 Frequency Response

Details the frequency response characteristics of the microphone.

4.3.2 Optimized Response (0°-incidence Free-field Response)

Shows the typical free-field response curve and its specified tolerances.

4.3.3 Actuator Response

Explains how actuator response is used to determine frequency response.

4.3.4 Low-frequency Response

Describes the low-frequency response characteristics and conditions.

4.3.5 Free-field Response

Presents free-field correction curves and typical responses at different incidence angles.

4.4 Directional Characteristics

Shows typical directional characteristics at various frequencies.

4.5 Dynamic Range

Defines and discusses the dynamic range, including inherent noise.

4.10 Stability

Covers the mechanical and high-temperature stability of the microphone.

4.17 Specifications Overview

Provides a summary of the key technical specifications for the Type 4190.

Chapter 5 Free-field 1/2" Microphone Type 4191

5.3 Frequency Response

Details the frequency response characteristics of the microphone.

5.3.5 Free-field Response

Presents free-field correction curves and typical responses at different incidence angles.

5.5 Dynamic Range

Defines and discusses the dynamic range, including inherent noise.

5.17 Specifications Overview

Provides a summary of the key technical specifications for the Type 4191.

Chapter 6 Pressure-field 1/2" Microphone Type 4192

6.3 Frequency Response

Details the frequency response characteristics of the microphone.

6.3.5 Free-field Response

Presents free-field correction curves and typical responses at different incidence angles.

6.5 Dynamic Range

Defines and discusses the dynamic range, including inherent noise.

6.17 Specifications Overview

Provides a summary of the key technical specifications for the Type 4192.

Chapter 7 Low-frequency Pressure-field 1/2" Microphone Type 4193

7.3 Frequency Response

Details the frequency response characteristics of the microphone, including adaptor effects.

7.3.5 Free-field Response

Presents free-field correction curves and typical responses at different incidence angles.

7.5 Dynamic Range

Defines and discusses the dynamic range, including inherent noise and adaptor effects.

Definition

Defines dynamic range as the span between distortion limit and noise floor.

7.17 Specifications Overview

Provides a summary of the key technical specifications for the Type 4193.

Chapter 8 1/2" Microphone Preamplifier Type 2669

8.2 Frequency Response

Explains how frequency response depends on input capacitance and capacitive load.

8.3 Dynamic Range

Provides an overview of dynamic range, including inherent noise spectrum.

Overview

Summarizes the lower and upper limits and dynamic range in dB.

Inherent Noise

Presents the typical 1/3-octave-band inherent noise spectrum.

8.8 Brüel & Kjær’s Patented Charge-injection Calibration Technique

Describes the CIC technique for verifying measurement set-ups, including microphones and preamplifiers.

8.9 Specifications Overview

Provides a summary of the key technical specifications for the Type 2669 preamplifier.

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