{"id":901,"date":"2018-01-04T17:36:04","date_gmt":"2018-01-04T04:36:04","guid":{"rendered":"https:\/\/aucklandhearing.co.nz\/?p=901"},"modified":"2019-03-24T12:00:14","modified_gmt":"2019-03-23T23:00:14","slug":"dead-regions-in-the-cochlear","status":"publish","type":"post","link":"https:\/\/aucklandhearing.co.nz\/hearing-loss\/dead-regions-in-the-cochlear\/","title":{"rendered":"Dead regions in the cochlear"},"content":{"rendered":"
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Cochlear dead regions<\/h2>\n

Earlier this year, I went to a talk by Brian Moore at The University of Auckland School of population health about testing for cochlear dead regions using the TENs test. I remember learning about this a number of years ago but it was great to hear it again and by the researcher himself.<\/p>\n

In summary, dead regions are where there are no longer inner hair cell or innervation in some frequencies. The cochlear is tonotopic- high frequencies are found in the basal part of the cochlear (the beginning) and low frequencies at the far end (the apex).<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Cochlear dead regions can occur\u00a0in:<\/h2>\n
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\u2013 the high frequencies (most common, can be due to noise induced hearing loss)
\n\u2013 low frequencies (more likely to be congenital)
\n\u2013 there can be a \u201cdead hole\u201d in the middle (very uncommon)
\n\u2013 a \u201csurviving island\u201d (very poor hearing)
\nor \u201cpatchy\u201d \u2013 possible auditory neuropathy (very poor hearing)<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Cochlear dead regions and hearing aids<\/h2>\n

Providing amplification (with hearing aids) in the frequency range where there is a dead region does not add any benefit. In some cases it can make hearing worse as it causes distortion across other\u00a0regions where hearing is good. This is why we often reduce amplification or take it away in the frequencies where people have severe or profound hearing loss.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Cochlear dead regions<\/h2>\n
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\"Cochlear<\/div>\n<\/figure>\n<\/div>\n
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\"Dead<\/div>\n<\/figure>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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Something to keep in mind\u2026<\/h2>\n

Frequency transposition\u00a0hearing aids take sound from one pitch (dead region) and move it to another (hearing region). \u00a0Hearing aids from most brands, have this type of solution in one form or another.<\/p>\n

The most interesting take away from the evening was, that\u00a0the research done by Brian Moore and his colleagues\u00a0has shown that using frequency transposition hearing aids does not increase speech understanding. It is great to keep this research in mind moving forward as\u00a0these frequency transposition features are often automatically switched on for certain hearing losses.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Cochlear dead regions Earlier this year, I went to a talk by Brian Moore at The University of Auckland School […]<\/p>\n","protected":false},"author":3,"featured_media":1006,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[647,818],"tags":[401],"yoast_head":"\nDead regions in the cochlear - Auckland Hearing<\/title>\n<meta \="" content='\"index,' follow,="" max-image-preview:large,="" max-snippet:-1,="" max-video-preview:-1\"="" name='\"robots\"'/>\n<link \="" href='\"https:\/\/aucklandhearing.co.nz\/hearing-loss\/dead-regions-in-the-cochlear\/\"' rel='\"canonical\"'/>\n<meta \="" content='\"en_US\"' property='\"og:locale\"'/>\n<meta \="" content='\"article\"' property='\"og:type\"'/>\n<meta -="" \="" auckland="" cochlear="" content='\"Dead' hearing\"="" in="" property='\"og:title\"' regions="" the=""/>\n<meta […]\"="" \="" a="" at="" auckland="" brian="" by="" content='\"Cochlear' dead="" earlier="" i="" moore="" of="" property='\"og:description\"' regions="" school="" talk="" the="" this="" to="" university="" went="" year,=""/>\n<meta \="" content='\"https:\/\/aucklandhearing.co.nz\/hearing-loss\/dead-regions-in-the-cochlear\/\"' property='\"og:url\"'/>\n<meta \="" content='\"Auckland' hearing\"="" property='\"og:site_name\"'/>\n<meta \="" content='\"https:\/\/www.facebook.com\/AuckHearing\"' property='\"article:author\"'/>\n<meta \="" content='\"2018-01-04T04:36:04+00:00\"' property='\"article:published_time\"'/>\n<meta \="" content='\"2019-03-23T23:00:14+00:00\"' property='\"article:modified_time\"'/>\n<meta \="" content='\"https:\/\/aucklandhearing.co.nz\/wp-content\/uploads\/2018\/01\/Cochlear.jpg\"' property='\"og:image\"'/>\n\t<meta \="" content='\"350\"' property='\"og:image:width\"'/>\n\t<meta \="" content='\"259\"' property='\"og:image:height\"'/>\n<meta \="" content='\"summary_large_image\"' name='\"twitter:card\"'/>\n<meta by\"="" content='\"Written' name='\"twitter:label1\"'/>\n\t<meta content='\"Maree' name='\"twitter:data1\"' o\u2019sullivan\"=""/>\n\t<meta content='\"Est.' name='\"twitter:label2\"' reading="" time\"=""/>\n\t<meta content='\"1' minute\"="" name='\"twitter:data2\"'/>\n<script class='\"yoast-schema-graph\"' type='\"application\/ld+json\"'></script>