From the Manufacturer
Etymotic Research HF5--High Clarity, Great Fit, and Maximum Noise Isolation
Made by Etymotic Research, the people who created in-ear earphones, the HF5 delivers Etymotic's world-renowned sound quality in a pair of comfortable, convenient earphones. The HF5 provides a near-perfect music experience.
The HF5 works with all MP3 players and iPod models, as well as the iPhone and any other device that operates with a 3.5 mm stereo plug. The HF5 can be worn with the cables in front or in back of the head, and the cable slider can be adjusted by moving it up or down for a snug fit.
The HF5 comes in black, Ruby, and Cobalt to match your style
Amazing response accuracy means unmatched crystal-clear sound
Designing the HF5: Etymotic Research Focuses on Noise Isolation and Response Accuracy Keeping Things Quiet with 35+ dB Noise Isolation
The special 3-flanged earpieces that come with the HF5 provide 35 dB noise isolation or more (depending on the eartip used), making it one of the highest-rated products on the market for both active and passive noise-canceling headphones. With 35 dB of isolation, you won't need to turn the music up as loud to hear every nuance of your favorite artists, saving your hearing and preventing "ear fatigue". Once you obtain a proper seal in the ear, watch the world disappear, leaving you with your favorite music reproduced with remarkable clarity. How Etymotic Research Measures Response Accuracy
The accuracy score is perhaps the single most important tool for earphone design. A perfect recording of a live performance played through earphones with 100% accuracy would produce the same sound at the eardrum as the live performance. A complicating factor is that the acoustic resonance and horn effects of the ear change a flat signal entering the open ear to an eardrum signal with the approximate frequency characteristic of the target curve. A perfect earphone will create that same frequency characteristic at the eardrum. Hitting the "Target Curve"
Target curves on Etymotic Research graphs indicate 100% accuracy: The open ear diffuse-field response of the KEMAR® mannequin modified to compensate for the high frequency boost added to high-quality recordings. This modification (approximately 5 dB at 10 kHz) is necessary to avoid earphones sounding too bright on commercial recordings. Commercial recordings have a high-frequency boost that compensates for the high frequency roll-off in studio monitor loudspeakers and high-quality stereo loudspeakers and earphones.
Earphone response is measured on a KEMAR® manikin that has the same acoustic properties as the average head and ear. 25-band accuracy scores are calculated by summing the difference between the earphone response and the target response in each 1.3 -octave band from 50 Hz to 12.5 kHz.
In the 1970s, Consumers Union used an "Accuracy Score" to rate loudspeakers. Consumer Reports reported that it was possible to predict listeners' loudspeaker ratings within 8% from a calculation based on one-third-octave frequency response measurements converted to loudness in sones. The average error in loudness from a perfect system, subtracted from 100%, gives the accuracy score. Etymotic Research extended this 21-band calculation to a 25-band calculation and routinely uses the 25-band accuracy score in all earphone designs.
Other in-the-ear earphone manufacturers do not report accuracy scores, but Etymotic Research has tested all competitive products. The accuracy scores of Etymotic Research earphones are higher than those of most loudspeakers, and well above all competitive earphones, except electrostatic headphones that cost thousands of dollars.
What Critics Are Saying
"They're cool looking (with the right tips, they look like sci-fi laser pistols), have little to no cable movement noise and reproduce sound in a way that is both perfectly clear and highly enjoyable. Everything about these gives the impression of quality, from the brushed aluminum finish to the way that music suddenly sounds distinctly layered in a way that it didn't before, and that it doesn't on many similarly priced units. [...] The tighter seal that these offer to most people is conducive to better listening, and the isolation properties are superb. You can't hear anything else with these guys in. Every manufacturer should have something like this." --John Herman, Gizmodo.com
- Frequency response: 20 Hz -16 kHz
- Noise isolation: 35- 42 dB (depending on eartip used)
- Acoustic polarity: + electrical = + acoustic
- Transducer type: Balanced armature
- Sensitivity (1 kHz): 105 dB SPL for a 0.1 VRMS input
- Impedance: 16 Ohms (nominal)
- Maximum output: 120 dB SPL
- Cable: 4 ft
- Weight: less than 1 oz
Etymotic's 5th generation of high-fidelity in-ear earphones has finally arrived. The HF5 delivers a near-perfect music experience, even in high surrounding noise conditions. Like Etymotic's earlier generations of in-ear earphones, the HF5 is built on superior noise isolation, so you experience total sound immersion when listening to your music. The HF5 is compatible with all iPod models and music players that accept a 3.5mm plug. This package includes the HF5 in-ear earphones, assorted eartips for your comfort, a filter changing tool with filters, and a protective carrying pouch.