TYPE 4190

TYPE 4190
Standard	IEC 61672
Sound field	Free field
Polarization voltage	200V
Sensitivity	50 mV/Pa
Lower limiting frequency	3.15 Hz
Higher limiting frequency	20 kHz
Inherent noise	14.6 dB(A)
Upper limiting of dynamic range	146 dB
Diameter	1/2 inch
Venting	Rear
Minimum Temperature	-30 °C
Maximum Temperature	150 °C
Minimum Temperature	-22 °F
Maximum Temperature	302 °F

Standard

IEC 61672

Sound field

Free field

Polarization voltage

200V

Sensitivity

50 mV/Pa

Lower limiting frequency

3.15 Hz

Higher limiting frequency

20 kHz

Inherent noise

14.6 dB(A)

Upper limiting of dynamic range

146 dB

Diameter

1/2 inch

Venting

Rear

Minimum Temperature

-30 °C

Maximum Temperature

150 °C

Minimum Temperature

-22 °F

Maximum Temperature

302 °F

USE OF FREE-FIELD MICROPHONES

At higher frequencies, reflections and diffractions cause a pressure increase in front of the diaphragm of a microphone. If not corrected for this would result in an increased output voltage.

A free-field optimisation means that the frequency response of the microphone has been designed in such a way that the free-field response at 0 degrees incidence is flat. This microphone is optimised for use with the protection grid in place.

Free-field microphones are commonly used for sound measurement in an anechoic chamber or far away from reflecting buildings, etc. Another area for free-field microphones is for general electroacoustic measurements like loudspeaker and microphone measurements.

Type 4190 is not only suited for use in class 1 Sound Level Meters but also for all high-precision acoustic measurements where a robust and stable, externally polarized free-field microphone with an upper frequency of 20 kHz is required.

STABILITY

A press-fitted, stainless-steel diaphragm ensures superior long-term stability and mechanical robustness – Type 4190 will withstand the 1 m drop test of IEC 60068-2-32.

POLARIZATION VOLTAGE

Type 4190 requires an external polarization voltage and must therefore be used with a classical preamplifier. Externally polarized microphones may be used at higher temperatures without severe changes in sensitivity.

Type 4190 is available in TEDS combinations with the classical Microphone Preamplifier Type 2669. The TEDS microphone is considered one unit and has been sealed in a clean environment.

The TEDS is programmed with the loaded sensitivity of the actual cartridge and the data is therefore readily available. The default TEDS template is to IEEE P 1451.4 but TEDS to IEEE 1451.4 is available on request.

Main Menu

Main Menu

Main Menu

Main Menu

TYPE 4190

USE OF FREE-FIELD MICROPHONES

STABILITY

POLARIZATION VOLTAGE

Related Services

We haved moved ${referer} to www.hbkworld.com

We haved moved ${referer} to www.hbkworld.com

We haved moved ${referer} to www.hbkworld.com