ER3C Insert Earphones

Advantages of ER•3C earphones:

• Incorporates “”touch-proof”” electrical connection for safety
• Duplicates ER•3A smooth frequency response
• Provides 30+ dB external noise exclusion – equivalent to a single-wall booth when used with deeply-sealed foam eartips
• Provides 70+ dB isolation (interaural attenuation) between ears; reduces the need for masking
• Reduces test/retest variability compared to supra-aural earphones
• Eliminates test errors due to collapsed ear canals
• Simplifies RECD (Real-Ear-to-Coupler-Difference) measurements
• May be calibrated in a 2-cc coupler, occluded ear simulator, or 0.4-cc coupler

System Includes:

• ER•3C earphones (10 Ohm or 50 Ohm)
• 7′ cable with dual-mono 6.33 mm (1/4″”) plugs
• 20 foam eartips (regular, 13 mm)
• 20 foam eartips (small, 10 mm)
• 2 foam eartips (large, 18 mm)
• Hook-and-loop neck strap

Instructions for Use:

• English User Guide
• Dutch User Guide
• French User Guide
• German User Guide
• Italian User Guide
• Spanish User Guide