Etymotic Research er-4b ユーザーガイド
ABOUT ET YMOTIC RESEARCH
11
RESPONSE ACCURACY
How We Measure Response Accuracy
Earphone response was measured on a KEMAR
®
manikin which 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.
each 1/3-octave band from 50 Hz to 12.5 kHz.
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100
%
ER•6 Isolator
Earphones
$139.00
Earbud
$49.99
Active-Noise-Canceling
Battery Operated
$299.99
Earbud
Active-Noise-Canceling
Battery Operated
$199.99
Active-Noise-Canceling
Battery Operated
$149.99
ER•4 MicroPro
Earphones
$330.00
ER-4S
Target
ER-6
Response of ER-6 and ER-4 Earphones
Compared to Target (100% Accurate Reproduction)