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Ultrasonic Microphone USB 5 Hz to 80 kHz

The 1/4” microphone cartridge MK 301 E is designed for ultrasound measurements up to 100 kHz in research and development and also for industrial use. Some applications include audiology, the measurement of building acoustics and noise levels.

The microphone cartridge has a fixed layer of backelectret to supply the polarization voltage.

It is designed and very carefully constructed to ensure excellent long-time stability of the electroacoustical parameters. 

All essential components including the diaphragm are made of nickel and the diaphragm is bonded by a special galvanic process. 

The rear electrode is insulated from the cartridge housing by a quartz glass plate. The diaphragm is protected against mechanical damage by a protection grid. 

The equalization of the static air pressure between the inside and outside of the cartridge is by means of a capillary tube rear-vented into the preamplifier.

The cartridge uses the international standard thread 60 UNS which ensures compatibility with a wide range of calibration equipment and measurement devices available from many manufactures.

The measuring microphone cartridge MK 301 is designed for sound level meters of IEC Type 1 according to IEC 6

iSV1611-Ultra

Ultrasonic USB Microphone MK 301 E + A67 + iSV1611

WS3F acc IEC 61094-4

Frequency range 5 Hz to 80 kHz with iSV1611 USB Mic. Amp

free field

Sound pressure level up to 168 dB

35dBA to 168dB

pre-polarized 

Ultrasonic noise of a mini PC with relatively high noise level of 54 dB at 44 000 Hz

iSV1611-Ultra

Measuring chain was calibrated with CA111 sound level meter calibrator before measurement

Frequency response up to 80 kHz – sampling frequency = 192 kHz

Ultrasound Microphone 5 Hz to 100 kHz
MK 301 E
WS3F according to IEC 61094-4
Diameter
1/4″
Frequency Range
5 Hz … 100 kHz (± 2 dB)
Responce Type
Capacitive pressure transducer
Electrode Forming Voltage
0 V
Sensitivity (dB re 20 μPa)
3.5 mV/Pa (± 3 dB)
Capacitance at 1 kHz
4.5 pF
Max. SPL for THD
≤ 3 % at 1 kHz
168 dB peak
Intrinsinc Noise Level
36 dB (A)
Operating Temperature Range
-20 °C ~ +100 °C
Operating Humidity Range
25 % ~ 90 %(RH)
Storage Humidity Range
25 % ~ 90 %(RH)
Venting
Rear
Outer Dimensions
with protection grid
Ф 7 mm x 9.7 mm
± 0,02 mm
Weight
2 gram
Model
USB Microphone
Preamplifier
Signal Amplitude ref. 50mV @ 1kHz
Frequency Response
Frequency Sampling 192 kHz
1Hz~20Hz, Error <3.0dB
20Hz~20kHz, Error<0.3dB
20kHz~80kHz, Error<3.0dB
Electrical signal
noise background
Ch.1 (<13dBA, <26dBZ)
Ch.2 (<50dBA, <63dBZ)
THD Input 1kHz, 50mV, A weighting
<0.1%
Overload Indicator
1kHz (THD<3%)
Ch.1 (>101.9dB)
Ch.2 (>140dB)
Amplitude accuracy
Input 31.6mV, 1kHz, 90.0dB
Error <0.2dB
Dimensions
1/2″ Outer diameter
of protector cover
Ф 20 × 165 mm
φ 13.2mm
Weight
<96 g (cable not included)
Operating Temperature
-20°C ~ + 60°C
Humidity
25 %~ 90 %(RH)
Atmospheric Pressure
65 kPa~108 kPa
Connector Type
USB2.0
Microphone Thread
11.7 mm-60 UNS