Speakerphone: SONY MDR-NC31 (NC) (IEM)

Measurement

[1. Appearance ]

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.

Digital Noise Cancelling(DNC) only works on devices with a 3.5 mm 5-pole audio contract, such as Sony Xperia Z series and Sony NWZ series.

Sony MDR-NC31 measurement

[2. Frequency Response]

Raw

Diffuse Field Target Compensated

• ISO 11904-2

Olive Welti Target Compensated

• AES 8994

CSD

• Olive Welti Target Compensated

[3. Phase ]

Minimum Phase

[4. Square Wave ]

• 300Hz

• 30Hz

[5. Harmonic Distortions ]

• 94dBSPL @ 500Hz

[6. Impedance ]

• DC Ohm

• Black: Impedance

• Green: Phase

[7. Effect of Insertion Depth ]

Uncompensated

• Black (normal): 5.0 mm

• Orange : 7.4 mm

Away from the Reference Plane

[8. Comparison ]

Uncompensated

• Black: Sony MDR-NC31

• Orange: Iriver ICP-AT500

Uncompensated

• Black: Sony MDR-NC31

• T-Peos Baguette

Speakerphone