BRUEL & KJAER 4964 Technical Documentation Manual
  1. Manuals
  2. Brands
  3. BRUEL & KJAER Manuals
  4. Microphone
  5. 4964
  6. Technical documentation manual
BRUEL & KJAER 4964 Technical Documentation Manual

BRUEL & KJAER 4964 Technical Documentation Manual

Microphone for hand-held analyzer types 2250, 2250-l and 2270
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Technical
Documentation
Microphone Type 4964
for Hand-held Analyzer
Types 2250, 2250-L and 2270
Supplement to Instruction Manual BE 1712
English BE 1864 – 11

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 4964 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for BRUEL & KJAER 4964

Summary of Contents for BRUEL & KJAER 4964

  • Page 1 Technical Documentation Microphone Type 4964 for Hand-held Analyzer Types 2250, 2250-L and 2270 Supplement to Instruction Manual BE 1712 English BE 1864 – 11...
  • Page 3 Microphone Type 4964 for Hand-held Analyzer Types 2250, 2250-L and 2270 Type 2250, from Hardware Version 1.1 Type 2250-L, from Hardware Version 2.0 Type 2270, from Hardware Version 3.0 Supplement to Instruction Manual BE 1712 BE 186411 December 2013...
  • Page 4 Safety Considerations This apparatus has been designed and tested in accordance with IEC 61010 – 1 and EN 61010 – 1 Safety Require- ments for Electrical Equipment for Measurement, Control and Laboratory Use. This manual contains infor- mation and warnings which must be followed to ensure safe operation and to retain the apparatus in safe condition. Special note should be made of the following: Safety Symbols The apparatus will be marked with this symbol when it is important that you refer to the associated warning...

  • Page 5: Table Of Contents

    CHAPTER 1 Introduction ............................1 About This Supplement ..........................1 System Overview............................1 CHAPTER 2 Information Required by the Standards .................... 3 Introduction..............................3 CHAPTER 3 Conformance Testing .......................... 5 Introduction..............................5 Electrical Substitute for Microphones ......................5 Testing 1/1-octave-band and 1/3-octave-band Filters ................6 CHAPTER 4 Specifications ............................

  • Page 7: Chapter 1 Introduction

    This section provides an overview of the additional hardware components used when the analyzers are configured with one of two microphone configurations based on Microphone Type 4964. The other hardware components can be found in Instruction Manual BE 1712, section 1.2.4.
  • Page 8 Microphone Type 4964 – Supplement to Instruction Manual BE 1712...

  • Page 9: Information Required By The Standards

    Chapter 2 Information Required by the Standards Introduction This chapter contains detailed information required by the standards to be described in the Instruction Manual. No additional information is required in Chapter 2 when using Microphone Type 4964 together with the analyzer.
  • Page 10 Microphone Type 4964 – Supplement to Instruction Manual BE 1712...

  • Page 11: Chapter 3 Conformance Testing

    • Set Input, Input to Top Socket 2) Calibrate the analyzer by typing in the nominal sensitivity as the Sensitivity on the Calibration display. For Microphone Type 4964, the nominal sensitivity is the microphone’s Open Circuit Sensitivity (50.00 mV/Pa), attenuated by the Microphone Preamplifier ZC-0032’s nominal attenuation (0.25 dB), which equates to 48.58 mV/Pa.

  • Page 12: Testing 1/1-Octave-Band And 1/3-Octave-Band Filters

    • Set Input, Input to Top Socket 2) Calibrate the analyzer by typing in the nominal sensitivity as the Sensitivity on the Calibration display. For Microphone Type 4964, the nominal sensitivity is the microphone’s Open Circuit Sensitivity (50.00 mV/Pa), attenuated by the Microphone Preamplifier ZC-0032’s nominal attenuation with UA-0211 mounted (18.25 dB), which equates to 6.12 mV/Pa.

  • Page 13: Chapter 4 Specifications

    NOTE: The specifications given here for the Z-weighting, as defined in IEC 61672–1, are also valid for the Lin response, as defined in IEC 60651. Microphone Microphone Type 4964 and Microphone Preamplifier ZC-0032: Type: Prepolarized Low-frequency Free-field ½Condenser Microphone Nominal Open Circuit Sensitivity: 50 mV/Pa, (corresponding to –26 dB re 1 V/Pa) ± 1.5 dB Capacitance: 14 pF (at 250 Hz) Nominal Preamplifier Attenuation: 0.25 dB without UC-0211, 18.25 dB with UC-0211...

  • Page 14: Self-Generated Noise

    –2 –4 100 Hz Electrical Response, Low Frequency set to Very Low Acoustical Response With Type 4964, Low Frequency set to Very Low 130464 Self-generated Noise Self-generated noise is given for nominal microphone Open Circuit Sensitivity. Sound Field Correction set to Free-field and no microphone accessories selected.
  • Page 15 CHAPTER 4 Specifications 4.8.1 Maximum Broadband Self-generated Noise Table 4.1a Frequency Weighting Maximum broadband Maximum self-generated noise A-weighting B-weighting C-weighting Noise Z-weighting Z-weighting without UC-0211 (dB) (dB) (dB) Normal (dB) Extended (dB) Single-range Microphone 15.6 14.4 14.4 16.2 16.2 Electrical 13.6 12.9 14.4...
  • Page 16 Microphone Type 4964 – Supplement to Instruction Manual BE 1712 4.8.2 Typical Broadband Self-generated Noise Table 4.2a Frequency Weighting Typical broadband Typical Noise self-generated noise A-weighting B-weighting C-weighting Z-weighting Z-weighting without UC-0211 (dB) (dB) (dB) Normal (dB) Extended (dB) Single-range Microphone 14.6...
  • Page 17 CHAPTER 4 Specifications 4.8.3 Typical Self-generated Noise Spectra Typical spectra for self-generated noise are shown in Fig.4.24a to Fig.4.29b. Fig.4.24a Typical self-generated noise, 1/1-octave band, Single-range, without UC-0211 Microphone Electrical Total 15 dB 10 dB 5 dB 0 dB –5 dB –10 dB –15 dB –20 dB...
  • Page 18 Microphone Type 4964 – Supplement to Instruction Manual BE 1712 Fig.4.25a Typical self-generated noise, 1/1-octave band, High Range, without UC-0211 Microphone Electrical Total 30 dB 25 dB 20 dB 15 dB 10 dB 5 dB 0 dB –5 dB –10 dB –15 dB...
  • Page 19 CHAPTER 4 Specifications Fig.4.26b Typical self-generated noise, 1/1-octave band, Low Range, with UC-0211 Microphone Electrical Total 30 dB 25 dB 20 dB 15 dB 10 dB 5 dB 0 dB –5 dB –10 dB 31.5 16 k 130471 Fig.4.27a Typical self-generated noise, 1/3-octave band, Single-range, without UC-0211 Total Microphone Electrical...
  • Page 20 Microphone Type 4964 – Supplement to Instruction Manual BE 1712 Fig.4.28a Typical self-generated noise, 1/3-octave band, High Range, without UC-0211 Microphone Electrical Total 30 dB 25 dB 20 dB 15 dB 10 dB 5 dB 0 dB –5 dB –10 dB –15 dB...

  • Page 21: Measuring Ranges

    CHAPTER 4 Specifications Fig.4.29a Typical self-generated noise, 1/3-octave band, Low Range, without UC-0211 Microphone Electrical Total 15 dB 10 dB 5 dB 0 dB –5 dB –10 dB –15 dB –20 dB 130476 Fig.4.29b Typical self-generated noise, 1/3-octave band, Low Range, with UC-0211 Microphone Electrical Total...
  • Page 22 Microphone Type 4964 – Supplement to Instruction Manual BE 1712 4.9.2 Total Range Total Range is defined as the difference between the Upper Limit on the least sensitive level range, and the lowest sound pressure level measurable on the most sensitive level range, which can be measured at 1 kHz within the most conservative tolerance limits, specified in the International Standards IEC 61672–1,...
  • Page 23 CHAPTER 4 Specifications 4.9.4 Indicator Range Indicator Range according to the International Standard IEC 60804: Table 4.5a Lower Limit Indicator Range Upper without UC-0211 Z-weighting Z-weighting Range Limit A-weighting B-weighting C-weighting Extended Low Normal (dB) (dB) (dB) (dB) Frequency (dB) (dB) Single 139.3...
  • Page 24 Microphone Type 4964 – Supplement to Instruction Manual BE 1712 4.9.6 Pulse Range Pulse Range according to the International Standard IEC 60804 is the difference between the Upper and Lower Limit in the following table: Table 4.7a Lower Limit Pulse Range...
  • Page 25 CHAPTER 4 Specifications Table 4.8a Lower Linear Operating Upper Limit Limit Frequency- Range without Weighting UC-0211 31.5 Hz 1 kHz 4 kHz 8 kHz 12.5 kHz (dB) (dB) (dB) (dB) (dB) (dB) Single-range A-weighting 100.6 139.7 140.8 138.9 135.3 24.8 B-weighting 122.9 139.7...
  • Page 26 Microphone Type 4964 – Supplement to Instruction Manual BE 1712 Table 4.8b Lower Linear Operating Upper Limit Limit Frequency- Range with Weighting UC-0211 31.5 Hz 1 kHz 4 kHz 8 kHz 12.5 kHz (dB) (dB) (dB) (dB) (dB) (dB) Single-range A-weighting 90.8...

  • Page 27: Spectrum Analysis

    CHAPTER 4 Specifications Table 4.9b Lower Peak C Range with Upper Limit Limit UC-0211 Range Table 4.9b 31.5 Hz 1 kHz 4 kHz 8 kHz 12.5 kHz (dB) (dB) (dB) (dB) (dB) (dB) Table 4.9b Single 130.2 132.9 132.2 130.3 126.6 57.6 High...
  • Page 28 Microphone Type 4964 – Supplement to Instruction Manual BE 1712 Below the Lower Limit, the Level Linearity Error is less than or equal to the error found in Fig.2.1 with set to the Lower Limit – 11.5 dB. 4.11.4 Measurement Range...

  • Page 29: Influence From The Operating Environment

    CHAPTER 4 Specifications 4.12 Influence from the Operating Environment 4.12.4 Vibration –2 Vibration Sensitivity (20 – 1000 Hz) for 1 ms : A-weighted max. 76 dB, Z-weighted max. 86 dB without UC-0211, A-weighted max 93 dB, Z-weighted max 103 dB with UC-0211.
  • Page 30 Microphone Type 4964 – Supplement to Instruction Manual BE 1712...

  • Page 31: Appendix E G-Weighting

    • Type 4964 without UC-0211 and Low Frequency is set to Extended • Type 4964 with UC-0211 and Low Frequency is set to Very Low At these low frequencies there are no significant influences from windscreens and sound fields.
  • Page 32 Microphone Type 4964 – Supplement to Instruction Manual BE 1712 Table E.1 Type 4964 Type 4964 with Frequency ISO 7196 Nominal Exact ISO 7196 without UC-0211 UC-0211 Tolerance weighting design 1/3-octave Frequency Relative Typical Typical Range goal and typical Frequency...

  • Page 33: G-Weighted Self-Generated Noise

    G-weighted Self-generated Noise Self-generated noise is given for nominal microphone Open Circuit Sensitivity, with Sound Field Correction set to Free-field and no microphone accessories selected. Table E.2 Type 4964 without UC-0211 Type 4964 with UC-0211 G-weighted self- generated noise Maximum...
  • Page 34 Microphone Type 4964 – Supplement to Instruction Manual BE 1712...

  • Page 35: Index

    Index About This Manual ................1 Maximum Broadband Self-generated Noise........9 ANSI S1.42–2001 ................25 Maximum Sound Level ..............15 Measurement Range ..............22 Measuring Ranges .................15 B*T Product ..................22 Microphone..................7 Microphone Reference Point ............7 Capacitance ..................7 Components Included with Type 2250/2270 ........1 Nominal Open Circuit Sensitivity ............7 Conformance Testing ...............
  • Page 36 Microphone Type 4964 – Supplement to Instruction Manual BE 1712...
  • Page 40 HEADQUARTERS: Brüel & Kjær Sound & Vibration Measurement A/S · DK-2850 Nærum · Denmark Telephone: +45 7741 2000 · Fax: +45 4580 1405 · www.bksv.com · info@bksv.com Local representatives and service organisations worldwide...

Table of Contents