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
iSV1611-Ultra
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
- pre-polarized
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
- pre-polarized
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
Model | MK 202 E |
|---|---|
Diameter | 1/2″ |
Frequency Range | 10 ~ 40 kHz (- 3 dB) |
Responce Type | Free field |
Electrode Forming Voltage | 0 V |
Sensitivity (dB re 20 μPa) | 14mV/Pa (±3dB) |
Capacitance at 250 Hz | 18 pF |
Maximum Sound Pressure Level | 158 dB |
Intrinsinc Noise Level | 22 dB (A) |
Operating Temperature Range | -50℃～+100℃ |
Operating Humidity Range | up to 70 °C, 90 % |
Temperature Characteristics |
<0.01dB/K |
Humidity Characteristics | 0.001 %(RH) |
Aging Drift | 0.2 dB/Year |
Storage Temperature Range | -20 °C ～ +60 °C |
Storage Humidity Range | 25 % ～ 90 %(RH) |
Venting |
rear vented |
Outer Dimensions | Ф 13.2 mm x 14.2 mm |
Weight | 8.5 gram |
USB Microphone Preamplier Specifications
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 |