Etymotic Research has introduced its new hf5 High Fidelity Earphones for iPod, iPhone, and other music players. Described as identical to the company’s earlier hf2 iPhone headset but without the microphone, the hf5s offer sound quality similar to that of the Etymotic’s ER-4P earphones, up to 35 dB of noise isolation from the included large and small triple-flange and foam eartips, and comes with a filter tool, 2 replacement filters, and…