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Sound and Vibration Instrument Hire and Calibration

Bruel & Kjaer 3595 Specifications


Bruel & Kjaer 3595 Sound Intensity Probe
 
B&K 3595 : Sound Intensity Probe Kit £ 27 a day *
 

Matched Sound Intensity Microphone Pairs :


Sound intensity free-field frequency ranges - 1/3-octave with 1/2" microphones Type 4197 connected to Dual Preamplifier Type 2683 (IEC 1043 Class 1): using the three standard spacers
 
8.5 mm spacer: 250 Hz to 6.3 kHz - pressure-residual index > 15.3 dB
 12 mm spacer: 250 Hz to 5.0 kHz - pressure-residual index > 16.8 dB
 50 mm spacer: 20 Hz to 1.25 kHz - pressure-residual index > 23 dB above 250 Hz)
 

Dimensions


Length of Extension Stem: 42 cm (16.5 in)
Width: 43 mm (1.7 in)
 

Weight:


Including. handle: 0.35 kg (0.77 lb)
In case: 6.50 kg (14.3 lb)
 

Sound Intensity Microphone Pair - Specifications


Type 4197
Diameter 1/2"
Polarisation Voltage (V) 200
Open-circuit sensitivity   mV/Pa 11.2 *
Open-circuit sensitivity   dB re 1 V/Pa -39
Free-field frequency response   ±1 dB 5 Hz to 12.5 kHz *
Free-field frequency response   ±2 dB 0.3 Hz to 20 kHz
Resonant frequency 34 kHz
Lower limiting frequency   -3 dB 0.14 Hz
Vent sensitivity re diaphragm sensitivity at 20 Hz <-64 dB * (-18 dB/octave)
Polarisation cartridge capacitance at 250 Hz 19.5 pF *
Cartridge thermal noise 20.0 dB(A)
Upper limit of dynamic range, Distribution <3 %, 100 Hz 162 dB SPL
Temperature coefficient   -10 °C to +50 °C, 250 Hz -0.002 dB/°C
Ambient pressure coefficient at 250 Hz -0.0007 dB/hPa
Humidity coefficient   100% RH <0.1 dB
Vibration sensitivity at 1 m/s2 65.5 dB SPL
Magnetic field sensitivity   50 Hz, 80 A/m 6 to 34 dB SPL
Thread for preamplifier mounting 5.7 - 60 UNS
Accessories included UC 5349 - 8.5 mm spacer
UC 5296 - 12 mm spacer
UC 5270 - 50 mm spacer
 
* individually calibrated
 

Matching Microphones - Specifications


Type 4197
Phase response difference - absolute value <0.05 ° : 20 Hz to 250 Hz *
Phase response difference - 1/3-octave centre frequencies <f [Hz]° / 5000 : 250 Hz to 6.3 kHz *
Amplitude response difference, normalized at 200 Hz <0.2 dB: 20 Hz to 1 kHz
Amplitude response difference, normalized at 200 Hz <0.4 dB: 20 Hz to 7.1 kHz
Sensitivity difference at 250 Hz <1 dB
Polarisation capacity difference <1.0 pF
 
* individually calibrated
 

Dual Preamplifiers 2631 - Specifications


Phase Matching : <0.015° at 50 Hz (20 pF microphone capacitance)
f [kHz] x 0.06° : 250 Hz to 10 kHz
Electrical noise re microphone sensitivity **   1/4" 6.4 pF dummy 39.2 dB SPL (A)
Electrical noise re microphone sensitivity **   1/2" 19.5 pF dummy 19.4 dB SPL (A)
Input impedance >15 GΩllxx pF ***
Attenuation for 1/2" microphones Ch. A = 0.6 dB; Ch. B = 0.3 dB
Attenuation for 1/4" microphones Ch. A = 1.7 dB; Ch. B = 0.7 dB
 
** This corresponds to a total (microphone + preamplifier noise floor of 39.3 dB SPL (A) and 22.7 dB SPL (A) respectively.
 
*** xx is typically 1.1 pF for Ch. A and 0.4 pF for Ch. B
 
Note:
All values are typical at 25 °C (77 °F), unless measurement uncertainty is specified.
All uncertainty values are specified at 2ó (i.e., expanded uncertainty using a coverage factor of 2)
 
E&OE - specifications subject to change without notice.