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PUI Audio?'s unidirectional electret condenser microphones (ECMs) also known as cardioid microphones are purpose-built to only capture sound from one direction. Four holes on the rear of the microphone capsule focus the sweet spot of the microphone's polar pattern to directly in front of the microphone.

Excellent for use in recording a single acoustic source, unidirectional microphones are great as boom microphones to record sound at distance, rejecting unwanted noise, or are used in pairs for two-channel stereo recording.
Unit of Measure

Specifications

Available

 N/A {0}

Manufacturer Stock

 N/A {0}

Brands

 N/A PUI Audio™

Manufacturer

 N/A PUI Audio�, Inc.

Directivity

 N/A Unidirectional

Note for Directivity

 N/A Minimum -12 dB drop in output at 180º±20º at 1 kHz

Sensitivity

 N/A -50 dB

Sensitivity Tolerance (±)

 N/A 4 dB

Testing Condition for Sensitivity

 N/A 1 kHz at 50 cm
0 dB=1V/Pa

Direct Current (DC) Rated Voltage

 N/A 2 V

Output Impedance at 1 Kilohertz (kHz) Frequency

 N/A 0.68 kΩ

Current Consumption

 N/A 500 µA

Note for Current Consumption

 N/A 3VS with 2.2 kΩ RL

Signal to Noise Ratio

 N/A > 55 dB

Note for Signal to Noise Ratio

 N/A 1 kHz, 94 dB input, A-Weighted

Decreasing Voltage

 N/A -3 V

Note for Decreasing Voltage

 N/A 2VS to 1.5VS
Frequency Range1 N/A 20 ~ 20000 Hz

Testing Condition for Frequency Range

 N/A At 50 cm, -10 dB

Direct Current (DC) Operating Voltage Range

 N/A 1 ~ 10 V

Maximum Sound Pressure Level (SPL) Input (Total harmonic distortion (THD) < 3 Percent (%))

 N/A 110 dB

Operating Temperature

 N/A -20 ~ +60 ºC

Storage Temperature

 N/A -40 ~ +70 ºC

Weight

 N/A < 0.3 g

Height

 N/A 5 mm

Diameter

 N/A 6 mm

Diameter Tolerance (±)

 N/A 0.1 mm

Angle Tolerance (±)

 N/A 3 º

Industry Standards

 N/A Restriction of Hazardous Substances (RoHS) 2011/65/EU

Reliability Testing

High Temperature Test

 N/A 200 hours at +60 ºC ± 3 ºC followed by two hours in normal room temperature

Low Temperature Test

 N/A 200 hours at -20 ºC ± 3 ºC followed by two hours in normal room temperature

Humidity Test

 N/A 200 hours at +40 ºC ± 3 ºC with relative humidity at 90% to 95% followed by 2 hours in normal room temperature

Temperature Cycle Test

 N/A 30 minutes at -25 ºC, 10 minutes at 20 ºC, 30 minutes at +70 ºC, 10 minutes at 20 ºC for five cycles, followed by 2 hours in normal room temperature

Vibration Test

 N/A 10-55 Hz for 1 minute with 1.52 mm distance, followed by a two-hour 3 axis test in packaging

Drop Test

 N/A Drop microphones in packaging onto concrete floor from 1-meter height in each of 3-axis

Electrostatic Discharge (ESD) Test

 N/A
  1. Contact discharge - Discharge 6000 VDC from capacitor into microphone output through 330Ω resistor ten times.
  2. Air discharge - Discharge 8000 VDC into sound hole of the microphone ten times.

Note for Reliability Testing

 N/A After each test, the speaker's SPL shall be ±3 dB of the original SPL

Features

Features

 N/A
  • -50 dB sensitivity at 50 cm
  • Cardioid shaped polar pattern for focused acoustic pickup
  • Integrated 33 pF and 10 pF buzz-blocking capacitors reduce GSM noise

Note

Note

 N/A Specifications subject to change or withdrawal without notice.
  • 1 On-axis 0° measurement