|
|
|
|
|
|
|
|
|
|
Small Open Bore
|
Belled Bore
|
|
|
|
|
|
• High frequency emphasis
• Some low end amplification
• Very smooth frequency response curve
• Small vent is most commonly used
|
• Very smooth frequency response curve
• High frequency emphasis
• Low end amplification
• No vent,very small vent is commonly used |
|
|
|
|
|
Half Bored Out
|
Large Open Bore
|
|
|
|
|
|
• High frequency emphasis
• Good performance when vented
• Suitable to HF losses
• Usable with HF aids
|
• High frequency emphasis
• Little low frequency amplification
• One of most commonly used CFA molds
• Small vent is most commonly used |
|
|
|
|
|
Non-Occulding
|
Reverse Curve
|
|
|
|
|
|
• High frequency emphasis, smooth curve
• Non-occluding long canal
• Used for those with tolerance problems,
• Low frequency noise problems
|
• Will cut highs 8 - 10dB
• Increase lows slightly
• Reverse curve adapter attached |
|
|
