Product Description

The etyBlu headset contains two microphones. One is located internally at the end of the earpiece; the other, a noise-canceling mic, is located in the BLUmaxx™ boom. The combination of an in-ear noise-isolating earphone and a boom mic provides exceptional sound quality and clear communication at both ends of the conversation.

From the Manufacturer

From the Manufacturer The etyBlu headset provides unparalleled call and voice quality for cell phone users. Itcontains two microphones. One is located internally at the end of the earpiece; the other, a noise-canceling mic, is located in the BLUmaxx™ boom. The combination of an in-ear noise- isolating earphone and a boom mic provides exceptional sound quality and clear communication at both ends of the conversation. The etyBLU headset was developed by Etymotic Research for use in high levels of background noise.
Earphone response is measured on a KEMAR® mannequin
with the same acoustic properties as the average head and ear.
The etyBLU headset features three different earpeices
for a comfortable fit

The etyBLU headset features a quick-connect boom microphone that can be attached or detached within seconds for added noise-cancelling and voice and call clarity.

Internal and BLUmaxx external mic modes
The earpiece is designed to be self-supporting in the ear canal, and features both an internal mic mode as well as the BLUmaxx mic mode. The BLUmaxx Mic Mode provides exceptional clarity in noisy environments giving up to 25 dB more noise cancellation of the talkers voice compared to the internal mic.

The etyBLU headset complies with the Bluetooth 2.1+EDR specification and implements the HSP profile 1.1, HFP profile 1.5 protocols. Featuring a long battery life of up to 7 hours of talk time and 100 hours of standby, the etyBLU also sports easy shortcuts built in the for following features: redial, voice dialing, call transfer, call waiting, and 3-way calling (features dependent on phone service plan).

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.

Target Curve
Target curves on Etymotic Research graphs indicate 100% accuracy: The open ear diffuse-field response of the KEMAR® manikin 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's in the Box
The etyBLU headset comes with the following items in the box: dual-mode noise-isolating headset, BLUmaxx Quick-Connect Mic, earloop, assorted eartips, windscreen, filter changing tool with replacement filter, storage case, USB charging cable.