{"id":1583,"date":"2013-10-21T14:07:35","date_gmt":"2013-10-21T05:07:35","guid":{"rendered":"http:\/\/ear-monitor.com\/?p=1583"},"modified":"2020-10-17T12:07:55","modified_gmt":"2020-10-17T03:07:55","slug":"advantages-of-silicone-over-acrylic-in-iem-design","status":"publish","type":"post","link":"https:\/\/ear-monitor.com\/?p=1583","title":{"rendered":"\uff29\uff25\uff2d\u3067\u30b7\u30ea\u30b3\u30f3\u304c\u30a2\u30af\u30ea\u30eb\u3088\u308a\u512a\u308c\u3066\u3044\u308b\u70b9\u3092\u30cf\u30fc\u30d0\u30fc\u30c9\u306e\u30d5\u30ea\u30ac\u30fc\u6559\u6388\u304c\u767a\u8868<br>\uff08Advantages of silicone over acrylic in IEM design\uff09"},"content":{"rendered":"<p>\u30a2\u30e1\u30ea\u30ab\u306e\u30cf\u30fc\u30d0\u30fc\u30c9\u30fb\u30e1\u30c7\u30a3\u30ab\u30eb\u30fb\u30b9\u30af\u30fc\u30eb\u306b\u6240\u5c5e\u3059\u308b\u30d6\u30e9\u30a4\u30a2\u30f3\u30fb\u30d5\u30ea\u30ac\u30fc\u6559\u6388\u306b\u3088\u308b\u3068\u3001\u300c\u30a2\u30af\u30ea\u30eb\u306f\u30b7\u30ea\u30b3\u30f3\u306e\u69d8\u306b\u3057\u3063\u304b\u308a\u3068500Hz\u4ee5\u4e0b\u306e\u97f3\u3092\u906e\u97f3\u3057\u306a\u3044\u3002\u3068\u8a00\u3046\u4e8b\u304c\u89e3\u3063\u3066\u3044\u308b\u300d \u3068\u767a\u8868\u3057\u3066\u3044\u307e\u3059\u3002\u66f4\u306b\u30d5\u30ea\u30ac\u30fc\u6559\u6388\u306f\u3001\u300c\u30a2\u30af\u30ea\u30eb\u88fd\u30a4\u30e4\u30e2\u30cb\u306e\u30ab\u30ca\u30eb\u90e8\u5206\uff08\u5916\u8033\u9053\u90e8\u5206\u30fc\u8033\u7a74\u306b\u5165\u308b\u90e8\u5206\uff09\u304c\u77ed\u3044\u5834\u5408\u30011000Hz\u4ee5\u4e0b\u306e\u906e\u97f3\u306f\u307e\u308c\u3067\u3042\u308b\u3002\u300d\u00a0\u3068\u8ff0\u3079\u3066\u3044\u307e\u3059\u3002\uff08\u75db\u307f\u306e\u51fa\u3084\u3059\u3044\u30a2\u30af\u30ea\u30eb\u88fd\u306f\u30b7\u30ea\u30b3\u30f3\u88fd\u306b\u6bd4\u3079\u308b\u3068\u30ab\u30ca\u30eb\u304c\u77ed\u3044\uff09<\/p>\n<p><!--more--><br \/>\n<strong style=\"color: blue;\"><\/p>\n<div class=\"wc-shortcodes-row wc-shortcodes-item wc-shortcodes-clearfix\"><\/strong><\/p>\n<p><strong style=\"color: blue;\"><\/p>\n<div class=\"wc-shortcodes-column wc-shortcodes-content wc-shortcodes-one-half wc-shortcodes-column-first \"><\/strong><\/p>\n<p><img data-attachment-id=\"1591\" data-permalink=\"https:\/\/ear-monitor.com\/?attachment_id=1591\" data-orig-file=\"https:\/\/i1.wp.com\/ear-monitor.com\/wp-content\/uploads\/c37afd92a686c08d2d9b89af6173b337.jpg?fit=4368%2C2912&amp;ssl=1\" data-orig-size=\"4368,2912\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;22&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;Canon EOS 5D&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1276191881&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;90&quot;,&quot;iso&quot;:&quot;100&quot;,&quot;shutter_speed&quot;:&quot;0.016666666666667&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"2\uff38\uff33\uff08\u30ce\u30fc\u30de\u30eb\u30b1\u30fc\u30d6\u30eb\uff09\" data-image-description=\"\" data-medium-file=\"https:\/\/i1.wp.com\/ear-monitor.com\/wp-content\/uploads\/c37afd92a686c08d2d9b89af6173b337.jpg?fit=300%2C200&amp;ssl=1\" data-large-file=\"https:\/\/i1.wp.com\/ear-monitor.com\/wp-content\/uploads\/c37afd92a686c08d2d9b89af6173b337.jpg?fit=1024%2C683&amp;ssl=1\" loading=\"lazy\" class=\"size-medium wp-image-1591 alignright\" src=\"https:\/\/i1.wp.com\/ear-monitor.com\/wp-content\/uploads\/c37afd92a686c08d2d9b89af6173b337-300x200.jpg?resize=300%2C200\" alt=\"\" srcset=\"https:\/\/i1.wp.com\/ear-monitor.com\/wp-content\/uploads\/c37afd92a686c08d2d9b89af6173b337.jpg?resize=300%2C200&amp;ssl=1 300w, https:\/\/i1.wp.com\/ear-monitor.com\/wp-content\/uploads\/c37afd92a686c08d2d9b89af6173b337.jpg?resize=768%2C512&amp;ssl=1 768w, https:\/\/i1.wp.com\/ear-monitor.com\/wp-content\/uploads\/c37afd92a686c08d2d9b89af6173b337.jpg?resize=1024%2C683&amp;ssl=1 1024w, https:\/\/i1.wp.com\/ear-monitor.com\/wp-content\/uploads\/c37afd92a686c08d2d9b89af6173b337.jpg?w=2000&amp;ssl=1 2000w, https:\/\/i1.wp.com\/ear-monitor.com\/wp-content\/uploads\/c37afd92a686c08d2d9b89af6173b337.jpg?w=3000&amp;ssl=1 3000w\" sizes=\"(max-width: 300px) 100vw, 300px\" data-recalc-dims=\"1\" \/>In-ear monitors are designed to provide exceptional sound quality while isolating the ear from exposure to unwanted sound. In effect, this reduces the noise floor, allowing the user to hear more clearly at lower, safer volume levels. To achieve and sustain high isolation, selecting the best material for the earpieces is of critical importance.<\/p>\n<p>Sensaphonics is one of the few manufacturers making its custom earphones out of medical-grade silicone. This soft, gel-like material offers an average of 10-to-12 dB more isolation than acrylic \u2013 approximately 37 dB total. Most other custom in-ear monitors (IEMs) are made from acrylic or plastic.<\/p>\n<p>According to Brian Fligor, AuD, ScD, of Harvard Medical School, acrylic seldom seals as tightly as silicone and attenuation below 500 Hz is rarely achieved.\u00a0 Fligor also states that when acrylic IEMs have short insertion depth, attenuation below 1000 Hz is uncommon.<\/p>\n<p>Because ambient sound on stage is typically low in frequency, the wearer must often increase IEM volumes to unsafe levels to hear the signal clearly.\u00a0 A tight-sealing IEM, most effectively achieved through the use of silicone, can alleviate this danger.\u00a0\u00a0 Silicone earphones are more difficult to fabricate, but the advantages of their physical attributes make it well worth the precision manufacturing required.<\/p>\n<p>Here are some examples:<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"187\">Material<\/td>\n<td width=\"187\">Silicone<\/td>\n<td width=\"187\">Acrylic<\/td>\n<\/tr>\n<tr>\n<td width=\"187\">Isolation<\/td>\n<td width=\"187\">Deeper fit allows for a more isolating seal.\u00a0 This can give the wearer the opportunity to decrease listening volume and increase safety<\/td>\n<td width=\"187\">Less isolation because of shallow fit and hollow construction. Loss of seal with ear canal is common, hurting bass response<\/td>\n<\/tr>\n<tr>\n<td width=\"187\">Sound Quality<\/td>\n<td width=\"187\">Lower noise floor enables high impact, accurate audio at safer volume levels, while full seal and isolation delivers full, natural bass response<\/td>\n<td width=\"187\">Some companies compensate for poor isolation by designing IEMs with several extra drivers and multiple crossovers. Louder isn\u2019t better, and can damage hearing<\/td>\n<\/tr>\n<tr>\n<td width=\"187\">Fit<\/td>\n<td width=\"187\">Because of its flexibility, silicone earphones can extend deeper into the ear canal, maximizing isolation while promoting a full, secure seal<\/td>\n<td width=\"187\">Tight fit of hard material can be painful to fully insert, while looser fitting designs shift during use, requiring manual adjustment<\/td>\n<\/tr>\n<tr>\n<td width=\"187\">Comfort<\/td>\n<td width=\"187\">Soft, flexible silicone moves with the ear canal and never rubs or chafes, allowing extended wearing times without discomfort<\/td>\n<td width=\"187\">Inflexibility of acrylic can cause fatigue or soreness as the ear canal moves along with the jaw, neck, and facial muscles<\/td>\n<\/tr>\n<tr>\n<td width=\"187\">Acoustic Variables<\/td>\n<td width=\"187\">Deeper fit reduces the \u201croom\u201d space between IEM and eardrum to about 1cc in size, effectively eliminating acoustics from the equation of frequency response and sound quality<\/td>\n<td width=\"187\">Not designed for deep insertion due to fit and comfort issues. Varying acoustic space among different users means audio accuracy will also vary<\/td>\n<\/tr>\n<tr>\n<td width=\"187\">Shock Protection<\/td>\n<td width=\"187\">Electronics are embedded and are protected from shock damage. Similarly, there is no chance of mechanical noise or vibration from loose or detached electronics<\/td>\n<td width=\"187\">Increased risk of mechanical noise from the electronics becoming detached from the IEM walls<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Prior to the year 2000, Sensaphonics also made its earphones in acrylic. At that time, the company\u2019s founder and president, Dr. Michael Santucci, developed a silicone version. This change was embraced with great enthusiasm by Sensaphonics clients, who verified the superior performance of silicone IEMs in the challenging world of touring sound. Sensaphonics has been committed to the superiority of silicone in custom in-ear monitors ever since. Today, many of the most demanding musicians, including Jon Bon Jovi, Steven Tyler of Aerosmith, Beyonce, and Kanye West, insist on Sensaphonics custom silicone IEMs.<\/p>\n<p><strong style=\"color: blue;\">\n<\/div>\n<p><\/strong><\/p>\n<p><strong style=\"color: blue;\"><\/p>\n<div class=\"wc-shortcodes-column wc-shortcodes-content wc-shortcodes-one-half wc-shortcodes-column-last \"><\/strong><\/p>\n<p>\u30a4\u30f3\u30a4\u30e4\u30fc\u30e2\u30cb\u30bf\u30fc\u306f\u3001\u300e\u5916\u306e\u97f3\u300f\u3084\u300e\u6f14\u594f\u306b\u5fc5\u8981\u306e\u306a\u3044\u97f3\u300f\u304c\u8033\u306b\u5165\u3089\u306a\u3044\u3088\u3046\u906e\u97f3\u3057\u306a\u304c\u3089\u3001\u8033\u306b\u306f\u7279\u5225\u306a\u97f3\u8cea\u3092\u63d0\u4f9b\u3059\u308b\u3088\u3046\u306b\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u5b9f\u8cea\u7684\u306b\u3001\u3053\u308c\u306f\u30b3\u30f3\u30b5\u30fc\u30c8\u30db\u30fc\u30eb\u3084\u30b9\u30c6\u30fc\u30b8\u4e0a\u306b\u6d41\u308c\u308b\u3001\u30a2\u30f3\u30d7\u3084\u6a5f\u68b0\u306e\u96d1\u97f3\uff08\u30ce\u30a4\u30ba\u30d5\u30ed\u30a2\uff09\u3092\u6e1b\u3089\u3059\u52b9\u679c\u304c\u3042\u308a\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u30af\u30ea\u30a2\u306b\u5b89\u5168\u306a\u97f3\u91cf\u3067\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u9ad8\u3044\u906e\u97f3\u6027\u3092\u751f\u3080\u306b\u306f\u3001\u30a4\u30e4\u30db\u30f3\u306e\u6210\u5f62\u306b\u6700\u9ad8\u306e\u7d20\u6750\u3092\u9078\u3076\u4e8b\u304c\u3001\u304d\u308f\u3081\u3066\u91cd\u8981\u306a\u306e\u3067\u3059\u3002<\/p>\n<p>\u30bb\u30f3\u30b5\u30d5\u30a9\u30cb\u30af\u30b9\u306f\u3053\u306e\u30ab\u30b9\u30bf\u30e0\u30a4\u30e4\u30e2\u30cb\u3092\u30e1\u30c7\u30a3\u30ab\u30eb\u30b0\u30ec\u30fc\u30c9\u306e\u30bd\u30d5\u30c8\u30b7\u30ea\u30b3\u30f3\u3067\u88fd\u9020\u3059\u308b\u5e0c\u5c11\u306a\u4f1a\u793e\u306a\u306e\u3067\u3059\u3002\uff08\u203b\u65e5\u672c\u3067\u306fj-phonic\u3060\u3051\u304c\u88fd\u9020\uff09<\/p>\n<p>\u3053\u306e\u67d4\u3089\u304b\u3044\u3001\u30b8\u30a7\u30eb\u306e\u3088\u3046\u306a\u6750\u6599\u306f\u3001\u30a2\u30af\u30ea\u30eb\u3088\u308a\u5e73\u574710\uff5e12dB\u591a\u304f\u306e\u906e\u97f3\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\uff08\u203b\u304a\u304a\u3088\u305d\u5408\u8a08\u3067\uff13\uff17\uff44B \u306e\u906e\u97f3\u6027\u304c\u3042\u308a\u307e\u3059\u3002\uff09<\/p>\n<p>\u4e16\u306e\u4e2d\u306b\u3042\u308b\u6b86\u3069\u306e\u30a4\u30e4\u30e2\u30cb\u306f\u30a2\u30af\u30ea\u30eb\u304b\u30d7\u30e9\u30b9\u30c1\u30c3\u30af\u88fd\u3067\u51fa\u6765\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u30a2\u30e1\u30ea\u30ab\u306e\u30cf\u30fc\u30d0\u30fc\u30c9\u30fb\u30e1\u30c7\u30a3\u30ab\u30eb\u30fb\u30b9\u30af\u30fc\u30eb\u306b\u6240\u5c5e\u3059\u308b\u30d6\u30e9\u30a4\u30a2\u30f3\u30fb\u30d5\u30ea\u30ac\u30fc\u6559\u6388\u306b\u3088\u308b\u3068\u3001\u300e\u30a2\u30af\u30ea\u30eb\u306f\u30b7\u30ea\u30b3\u30f3\u306e\u69d8\u306b\u3057\u3063\u304b\u308a\u3068500Hz\u4ee5\u4e0b\u306e\u97f3\u3092\u906e\u97f3\u3057\u306a\u3044\u3002\u300f\u3068\u8a00\u3046\u4e8b\u304c\u5206\u304b\u3063\u3066\u3044\u307e\u3059\u3002\u66f4\u306b\u30d5\u30ea\u30ac\u30fc\u6559\u6388\u306f\u300e\u30a2\u30af\u30ea\u30eb\u88fd\u30a4\u30e4\u30e2\u30cb\u306e\u5916\u8033\u9053\u90e8\u5206\uff08\u8033\u306b\u5165\u308b\u90e8\u5206\uff09\u304c\u77ed\u3044\u5834\u5408\u30011000Hz\u4ee5\u4e0b\u306e\u906e\u97f3\u306f\u307e\u308c\u3067\u3042\u308b\u3002\u300f\u3068\u8ff0\u3079\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u4e00\u822c\u7684\u306b\u30b9\u30c6\u30fc\u30b8\u4e0a\u3067\u6d41\u308c\u308b\u97f3\u306f\u4f4e\u5468\u6ce2\u6570\u306e\u70ba\u3001\u30a2\u30af\u30ea\u30eb\u30e6\u30fc\u30b6\u30fc\u306f\u8074\u529b\u306b\u5b89\u5168\u3068\u306f\u8a00\u3048\u306a\u3044\u30ec\u30d9\u30eb\u307e\u3067\u97f3\u91cf\u4e0a\u3052\u306a\u3044\u3068\u3001\u30af\u30ea\u30a2\u306a\u97f3\u3092\u805e\u304f\u3053\u3068\u304c\u51fa\u6765\u306a\u3044\u306e\u3067\u3059\u3002\u30b7\u30ea\u30b3\u30f3\u3092\u4f7f\u7528\u3057\u3066\u5f37\u3044\u906e\u97f3\u6027\u3092\u751f\u3080\u3053\u3068\u3067\u3001\u3053\u306e\u5371\u967a\u3092\u8efd\u6e1b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u30b7\u30ea\u30b3\u30f3\u3067\u306e\u30a4\u30e4\u30e2\u30cb\u88fd\u9020\u306f\u6700\u3082\u96e3\u3057\u3044\u88fd\u9020\u65b9\u6cd5\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u30b7\u30ea\u30b3\u30f3\u306e\u751f\u3080\u7279\u8cea\u7684\u306a\u9577\u6240\u306b\u306f\u3001\u5fc5\u8981\u306a\u7cbe\u5bc6\u88fd\u9020\u306e\u4fa1\u5024\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306e\u8868\u304c\u4e21\u8005\u306e\u6bd4\u8f03\u4f8b\u3067\u3059\u3002<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"187\">\u3000\uff08\u7d20\u6750\uff09<\/td>\n<td width=\"187\">\u30b7\u30ea\u30b3\u30f3\u3000\uff08Silicone\uff09<\/td>\n<td width=\"187\">\u30a2\u30af\u30ea\u30eb\u3000\uff08Acrylic\uff09<\/td>\n<\/tr>\n<tr>\n<td width=\"187\">\u906e\u97f3\u6027<\/td>\n<td width=\"187\">\u6df1\u304f\u30d5\u30a3\u30c3\u30c8\u3055\u305b\u308b\u3053\u3068\u3067\u3001\u66f4\u306a\u308b\u906e\u97f3\u3092\u751f\u3080\u3053\u3068\u304c\u51fa\u6765\u308b\u3002<\/p>\n<p>\u3053\u308c\u306f\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u306e\u97f3\u91cf\u3092\u4e0b\u3052\u308b\u3053\u3068\u304c\u51fa\u6765\u3001\u5b89\u5168\u6027\u3092\u9ad8\u3081\u3089\u308c\u307e\u3059\u3002<\/td>\n<td 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