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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of Etymotic Er-4b, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.
What is an instruction?
The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of Etymotic Er-4b one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.
Unfortunately, only a few customers devote their time to read an instruction of Etymotic Er-4b. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.
What should a perfect user manual contain?
First and foremost, an user manual of Etymotic Er-4b should contain:
- informations concerning technical data of Etymotic Er-4b
- name of the manufacturer and a year of construction of the Etymotic Er-4b item
- rules of operation, control and maintenance of the Etymotic Er-4b item
- safety signs and mark certificates which confirm compatibility with appropriate standards
Why don't we read the manuals?
Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of Etymotic Er-4b alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of Etymotic Er-4b, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Etymotic service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of Etymotic Er-4b.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the Etymotic Er-4b item, and its use of respective accessory, as well as information concerning all the functions and facilities.
After a successful purchase of an item one should find a moment and get to know with every part of an instruction. Currently the manuals are carefully prearranged and translated, so they could be fully understood by its users. The manuals will serve as an informational aid.
Table of contents for the manual
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U s e r M a n u a l[...]
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C A U T I O N Consult a ph ysician or audiologist if y ou ha ve excessive ear wax, difficult y inserting the eartips, or disc omfor t after pr olonged use . ER • 4 MicroPro earphones exclude most external sounds even at low listening volumes. It is unsafe to use insert earphones while driving a mot orized vehicle , operating machinery , bicycling[...]
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3 A B O U T E T Y M O T I C R E S E A R C H A B O U T E R • 4 E A R P H O N E S ER • 4 MicroPro earphones were the first high-fidelity , in-ear earphones to use balanc ed arma ter drivers. These high definition transducers combine flat frequency response with passiv e noise isolation. Noise reduction with ER • 4 MicroPro earphones occurs natu[...]
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A B O U T E T Y M O T I C R E S E A R C H 4 D E S C R I P T I O N S ER • 4P earphones can be used with any audio sour ce without requiring an additional amplifie r . ER•4P earphones have 10 dB gr eater output a t high frequencies and 13 dB gr eater output a t low frequencies than ER•4S earphones. T he higher sensitivity and enhanced bass of t[...]
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A B O U T E T Y M O T I C R E S E A R C H 5 S Y S T E M I N C L U D E S • ER • 4 Micr oPro earphones • 5 ft c ord with 3.5 mm stereo phone plug • 1⁄4" stereo phone adapter plug • Assorted ear tips • F ilter changing tool and replac ement filters • Shirt clip • P ouch and storage box Replacement accessories ar e a vailable at [...]
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E A R T I P S ER•4 MicroPro earphones are supplied with an assortment of eartips that seal most ears. Ear tips pr ovide excellent sound r eproduction when properly inser ted . 3-flange ear tips • Clean regularly • Replace ever y 6-12 months Foam and Glider ear tips • Disposable • Replace as needed Changing the ear tips • A combination o[...]
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I N S E R T I O N Sound quality and noise isolation depend on how w ell the ear tips seal. If the earphones seem to lack bass, insert the earphones deeper into the ear canals to obtain a better seal, or try another ear tip option. 3-flange ear tip insertion • For best results , moisten the eartip befor e insertion. • Carefully inser t one earph[...]
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F I L T E R S 8 ER•4 MicroPro earphones hav e special filters that shape the frequency response and prev ent ear wax fr om en tering the earphones. These gr een filters are loca ted in the end of each earphone and ar e visible when the eartips are removed . A dirty filter will reduc e or block the earphone output. A filt er may be block ed withou[...]
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9 1. Remove Eartip. 2. Screw the threaded end of the tool into the filter to grasp it. 3. Remove filter by pulling straight out. 1. Insert a new filter. Then gently press the earphone against a hard sur face to secure the filter in place. 2. Re-attach ear tip. Filter removal Filter replacement C H A N G I N G F I L T E R S[...]
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10 S P E C I F I C A T I O N S Response Accuracy: ER-4B/4S: 92% ER-4P: 86% Noise Isolation: 35-42 dB Frequency response: 20 Hz - 16 kHz Acoustic polarity: + electrical = + ac oustic T ransducer type: balanced armature 1 kHz sensitivit y (ER-4B/ER-4S): 108 dB SPL for a 0.79 V input (90 dB @ 0.1 V; 100 dB @ 1mW ) 1 kHz sensitivit y (ER-4P): 108 dB SP[...]
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11 Response of MicroPro Earphones (measured at eardrum) The above gr aph indicat es that 4P earphones have 10-12 dB higher sound output and slightly mor e bass than the ER•4S earphones. The dott ed red line is the tar get r esponse of the open ear to a liv e performance (CD equal ization). The black line r epresents how a listener per ceives the [...]
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ET YMO TIC RESEARCH INC. 61 Mar t in Lan e • E lk Grove V il la ge, I L 60 00 7 w w w. e t y m o t i c . c o m • 8 8 8- 38 9- 66 8 4 ER • 4 MicroPro TM is a trademark of Etymotic Research, Inc. © 2009 ER004015-B A B O U T E T Y M O T I C R E S E A R C H Etymotic Research is a research, development and manufacturing company that designs produ[...]