As part of its growing line of inMotion portable audio products, Altec Lansing today announced two new earphones which they say provides high-definition sound. The inMotion iM616 ($149.95) and iM716 ($199.95) are expected to be available later this month. Both headphones, Altec Lansing said, are both in-ear listening system which combine the company’s audio reproduction background with Etymotic Research technology which provides 35db of noise isolation. The inMotion iM616 features enhanced bass, while the inMotion iM716 features that as well as high definition audio modes, enabling users to choose one or the other with an in-line controller located on the cable. Both units weigh less than an ounce and come with multiple ear tips to best fit the user’s ear for comfort. "We launched our inMotion brand of portable audio speakers in 2003 and quickly captured 80% market share. These new earphones extend our portable franchise into the wearable audio arena, and they address the same demand for upscale personal audio as our mobile docks for the iPod and other consumer electronics," said Robert Heiblim, Senior Vice President of Sales and Marketing for Altec Lansing.