Sony today announces the Altus portable stereo headphones to give listeners high-fidelity audio at home, in the office or on the go.

Through high-definition driver units that offer up to 80 kilohertz frequency response, the Altus headphones deliver pristine, high-quality sound previously unavailable in a portable headphone.

?We named this product Altus to represent the incredibly high frequencies and natural-sounding audio the headphones deliver,? said Jim Leahey, Sony?s general manager for peripherals and enhancements.

Sony developed the product with comfort and attention to detail in mind. The headphones feature a brushed aluminum earcup, ear and head cushioning and a single-sided cord.

The headphones also have a sturdy headband that adjusts to fit snugly ? enhancing sound quality. By positioning the 40mm HD driver units at an angle parallel to the human ear, Altus headphones reduce pressure, increase comfort and deliver a more natural listening experience.

The product?s ambient sound-in switch controls the diaphragm in each earpiece. When open, the diaphragm moves freely letting in more outside sound, convenient when walking on city streets, for example. When closed, the diaphragm remains fixed allowing the listener to concentrate on high-quality audio.

For travelers, the headphones can be folded into the accompanying drawstring pouch that takes up minimal space in an over-the-shoulder bag and protects the headphones in transit.

The Altus headphones will be available for purchase at Sony Style stores and major national retailers in November for about $150. To pre-order the headphones, please visit www.sonystyle.com/altus. The headphones also will be available to test at Sony Style stores starting October 12.