Sony MDR-NC31EM (NC) (IEM)

Measurement

[1. Appearance ]

MDR-NC31EM noise cancelling headset, which is the successor of MDR-NC31, includes a mic on each ear that tracks the noise around you.

These noise signals are sent to the device's DNC circuit, which inverts the sound wave before sending it back to your ears with the reduced noise.

Sony MDR NC31EM measurement

• Noise Cancellation

• 5-pole plug

[2. frequency Response ]

Check my Measurement Procedures first.

Uncompensated

Diffuse Field Target Compensated

Olive Welti Target Compensated

CSD

[3. Minimum Phase ]

[4. Square Wave ]

 • 300Hz

 • 30Hz

[5. Harmonic Distortions ]

• 94dB SPL @ 500Hz

(100%~0.01% scale)

[6. Impedance ]

• DC Ohm

Black: Impedance Magnitude

Green: Electrical Phase

[7. Effect of Insertion Depth ]

Uncompensated

• Black(normal): 5.5 mm

• Orange: 7.4 mm

Away from the reference plane

[8. Effect of the Comply™ Foam Tip]

Uncompensated

• Black: normal

• Orange: Comply™ Foam Tip T-500

[9. Effect of the built-in Xperia Z3 Equalizer ]

Equalizer

Output of the Xperia Z3 Equalizer

① Without Equalizer

• Olive Welti Target Compensated

② Equalizer Applied

• Olive Welti Target Compensated

(Black: Left / Red: Right)

[10. Difference between the NC31 and NC31EM ]

Uncompensated

• Black: Sony MDR-NC31

• Orange: Sony MDR-NC31EM

Olive Welti Target Compensated

• Black: Sony MDR-NC31

• Orange: Sony MDR-NC31EM

Impedance Magnitude

• Red: Sony MDR-NC31

• Black: Sony MDR-NC31EM