Etymotic Research ER-4S (IEM)

Measurement

Etymotic Research ER4S Measurement

• Single BA ( Knowles ED29689)

• Detachable cable

• MSRP 299$

[1. Frequency Response ]

Please check the Measurement Procedures first.

Raw

Diffuse Field Target Compensated

• ® ISO 11904-2

Olive Welti Target Compensated

• ® AES 8994

[2. CSD ]

Olive Welti Target Compensated

[3. Phase ]

Minimum Phase

[4. Square Wave ]

• 300Hz

• 30Hz 

[5. Harmonic distortions ]

Harmonic Distortions

• 94dBSPL @ 500Hz

[6. Impedance magnitude ]

• Black: Impedance Magnitude

•  Green:  Electrical Phase

[7. Compensated Frequency Response ]

• Grey: Uncompensated

Diffuse Field Target Compensated

• Blue: Bruel & Kjaer 4128C

• Green: GRAS Kemar Type 45BM

• Orange: Head Acoustics HMS II.3

• ® Technical University of Denmark

[8. Effect of Etymotic Research Eartips ]

Uncompensated

• Black: ER38-18

• Green: ER38-18CL

• Orange: ER38-15SM

Difference

• Ref.(Flat): ER38-18

• Green: ER38-18CL

• Orange: ER38-15SM

Uncompensated

• Black: ER38-18

• Green: ER38-14F

• Orange: ER38-17

Difference

• Ref.(Flat): ER38-18

• Green: ER38-14F

• Orange: ER38-17

[9. Effect of Knowles Acoustic Dampers ]

Uncompensated

Difference

• Ref.(Flat): without Acoustic Damper

[10. Effect of insertion depth ]

Uncompensated

• Orange: -1 mm

• Black: 0 mm

• Green: 2 mm

Away from the reference plane

[11. Effect of Electrical Dampers ]

Uncompensated

• Black: 0 ohm

• Orange: 100 ohm

• Green: 600 ohm

Difference

• Ref.(Flat): 0 ohm