Etymotic Research is the world leader for in-ear isolating earphones. The range includes the award winning ER•4, ER•6 and ER•6i Isolator series earphones and the new HF2 for iPhone.
The ER-200 Personal Noise Dosimeter is an inexpensive, easy-to-use screening device that provides a good estimate of noise dose and alerts the user to the risk of over exposure.
Price: $ 79.95
The hf2 is a high-fidelity, hands-free noise-isolating headset and earphones combination. But it's really much, much more than that. The hf2 provides a near-perfect music experience.