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Calibration Microfoon of the OtoCube

 Standard

Model

MPA416

Optimized

Free Field

Diameter

1/4″

Standards

IEC Class-1

Frequency Response (Hz)

20 ~ 20k

Open-circuit Sensitivity (mV/Pa) (±2dB)

50

Dynamic Range (dBA)

29~ 127

Inherent Noise (dBA)

< 29

Venting

Rear

Operating Temperature Range ()

-10 ~ 50

Operating Humidity Range (RH)

0 ~ 95%

(Without Condensed Water)

Supply Power 

 ICCP 2-20mA

Equivalent Air Volume (250 Hz) (mm3)

 -

Temperature Coefficient (dB/)

15-35C  

Humidity Coefficient (dB/%RH)

20%-90%

Pressure Coefficient (250 Hz) (dB/kPa)

-0.06

Dimensions

IEC-61672 Class-1

Screw Thread

M11.7 – 60UNS

Specifications of the MPA416 microphone

 

The microphone has a linear response. The correction for Free Field to Random Incidence is made in the calibration software of the OtoCube.

 

Option 

Optional the OtoCube can be deliverd with 1/2 ince MP281 microphone with random-incidence (ANSI Type 1, IEC 1094-4 Type WS2). This microfphone needs a preamplifier.

Model

MA221

Diameter

1/2 inch

Frequency Response (Ref: 250 Hz, ±0.2 dB)

20 Hz ~ 200 kHz

Attenuation (10 Hz ~ 100 kHz)

< 0.5 dB

Input Impedance

> 5 GW

Output Impedance

< 110 W

Electrical Noise

A-weighting  < 2.0 μV

20 Hz ~ 20 kHz < 6.0 μV

Max Output Voltage

4.5 Vrms

Power Requirement

ICCP (2 ~ 20 mA)

Operating Temperature

-20°C ~ 80°C

Operating Humidity

0 ~ 98% RH

Length

36 mm

Output Connector

SMB

Thread for Microphone

Φ11.7 mm x 60 UNS

Specifications for the matching preamplifier MA221