Ultrasonic Microphone USB 5 Hz to 80 kHz
The 1/4” microphone cartridge MK 301 E is designed for acoustical measurements 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
MK 301 E 1/4" microphone capsule
- 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
Ultrasonic noise of a mini PC -> relatively high noise level of 54 dB at 44 000 Hz
Measuring chain was calibrated with CA111 sound level meter calibrator before measurement
Frequency response up to 80 kHz – sampling frequency = 192 kHz
Ultrasonic USB Microphone
The 1/2” microphone capsule MK 202 E is designed for acoustic measurements in
research, development and industry and is also used in building acoustics and audiology, among other things.
- Frequency range 10 Hz to 40 kHz
- free field
- Sound pressure level up to 158 dB
- 22dBA to 158dB
The measurement microphone capsule has a fixed charge carrier layer (backelectret) to provide the polarization voltage.
The careful construction and the constructive concept of the microphone capsules guarantee a high temporal constancy of the electro-acoustic parameters.
The internationally common thread type (60 UNS) for connecting the microphone capsule allows interchangeability with other 1/2” microphone capsules and enables connection to all suitable calibration and measuring devices.
MK 202 E + iSV1611
The iSV1611 digital USB microphone preamplifier is suitable for all common pre-polarized 1/2” measurement microphone capsules.
The thread type 60 UNS allows the combination of different microphone capsule manufacturers depending on the application.
For ultrasonic applications we offer the MK 202 E from Microtech Gefell GmbH.
Ultrasonic Microphone Capsule Specification
MK 202 E
10 ~ 40 kHz (- 3 dB)
Electrode Forming Voltage
Sensitivity (dB re 20 μPa)
Capacitance at 250 Hz
Maximum Sound Pressure Level
Intrinsinc Noise Level
22 dB (A)
Operating Temperature Range
Operating Humidity Range
up to 70 °C, 90 %
Storage Temperature Range
-20 °C ～ +60 °C
Storage Humidity Range
25 % ～ 90 %(RH)
Ф 13.2 mm x 14.2 mm
USB Microphone Preamplier Specifications
Signal Amplitude ref. 50mV @ 1kHz
Frequency Sampling 192 kHz
1Hz~20Hz, Error <3.0dB
Ch.1 (<13dBA, <26dBZ)
Ch.2 (<50dBA, <63dBZ)
THD Input 1kHz, 50mV, A weighting
Input 31.6mV, 1kHz, 90.0dB
1/2″ Outer diameter
of protector cover
Ф 20 × 165 mm
<96 g (cable not included)
-20°C ~ + 60°C
25 %～ 90 %(RH)
65 kPa～108 kPa
11.7 mm-60 UNS