- Class 1 WS3F acc. IEC 61094-4
- Frequency range 5 Hz to 80 kHz
- Free Field
- Sound pressure level up to 168 dB
- 35dBA to 168dB
- Pre-polarized
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 61094-4
Ultrasonic noise of a mini PC with 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
MK 301 E | WS3F – 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 |
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 |
