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	<title>Comments on: Introduction to Hearing Aids</title>
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	<link>https://www.epanorama.net/blog/2015/01/27/introduction-to-hearing-aids/</link>
	<description>All about electronics and circuit design</description>
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		<title>By: Tomi Engdahl</title>
		<link>https://www.epanorama.net/blog/2015/01/27/introduction-to-hearing-aids/comment-page-1/#comment-1847153</link>
		<dc:creator><![CDATA[Tomi Engdahl]]></dc:creator>
		<pubDate>Mon, 24 Feb 2025 12:03:27 +0000</pubDate>
		<guid isPermaLink="false">http://www.epanorama.net/newepa/?p=29587#comment-1847153</guid>
		<description><![CDATA[Onko sinullakin Suomen yleisin ammattitauti?
Moni käyttää melun torjuntaan vastamelukuulokkeita, ja se on tyhmintä mitä kuulolleen voi tehdä.
https://www.iltalehti.fi/terveysuutiset/a/cfd7858a-3479-4be0-9497-f87a50f3c0c0

Monilla meluisilla työpaikoilla käytetään musiikin kuunteluun tarkoitettuja vastamelukuulokkeita kuulonsuojaimina, vaikka ne eivät suojaa melulta. Asiasta tiedottaa Länsi- ja Sisä-Suomen aluehallintovirasto.

– Olemme törmänneet työpaikkatarkastuksissa toistuvasti tilanteeseen, jossa meluisassa työympäristössä työntekijät käyttävät omia musiikin kuunteluun tarkoitettuja kuulokkeita tai nappikuulokkeita kuulonsuojaimina. Huolimatta siitä, että näissä kuulokkeissa voi olla vastamelutoiminto, ne eivät ole lainsäädännön edellyttämiä henkilönsuojaimia, kertoo tarkastaja Rami Laine tiedotteessa.

Kuulonsuojainten tarkoitus on suojata kuuloa haitalliselta melulta ja estää kuulovaurion syntyminen. Suomessa meluvamma on yhä yleisin ammattitauti. Kuulonsuojaimia on käytettävä työssä aina, kun melualtistus ylittää 85 desibeliä dB(A). Työntekijä on kuitenkin oikeutettu saamaan kuulonsuojaimet käyttöön, kun melualtistus on yli 80 dB(A).

Melulle altistumista on rajoitettava

Työturvallisuuslain mukaan työntekijän altistuminen melulle on rajoitettava niin vähäiseksi, ettei siitä aiheudu haittaa tai vaaraa työntekijän turvallisuudelle tai terveydelle. Työnantajan on tunnistettava melua aiheuttavat tekijät ja selvitettävä työntekijöiden mahdollinen altistuminen melulle. Työnantajan on arvioinnin perusteella poistettava melun vaarat ja haitat tai vähennettävä niitä niin paljon kuin mahdollista.

Melun äänitasosta ja taajuudesta riippuen suojaimet valitaan niin, että työntekijä on melulta suojassa, mutta kuulee tarvittaessa esimerkiksi hälytys- ja varoitusäänet. Jos työssä on tarve kommunikoida, valitaan suojaimet, jotka tämän mahdollistavat.

– Kun suojainten käyttötarve on riskinarvioinnissa tunnistettu ja määritelty, on työntekijöiden käytettävä työnantajan tarjoamia suojaimia, Laine toteaa.

Jos työpaikan ääniympäristö ei edellytä kuulonsuojaamista ja työ mahdollistaa esimerkiksi musiikin kuuntelun, työnantaja voi sallia omien kuulokkeiden käytön työssä. Tällöin työnantajan on riskinarvioinnissa pohdittava kuulokkeiden käytön tuomat mahdolliset lisäriskit.

– Työnantaja voi riskinarvioinnin perusteella asettaa kuulokkeiden käyttöön kieltoja tai rajoituksia esimerkiksi siksi, että keskittyminen herpaantuu, varoitusääniä ei kuulla, trukkiliikennettä, painavia nostoja tai koneiden ja laitteiden epänormaalia käyttöääntä ei huomata. 

Yleisin ammattitauti

Työterveyslaitoksen mukaan meluvamma on lukumäärällisesti yleisin ammattitauti Suomessa. Meluvamman aiheuttaa altistuminen yli 135-137 dB(C) impulssimaiselle melulla tai pitkäaikaiselle yli 80-85 dB(A) tasaiselle melulle.]]></description>
		<content:encoded><![CDATA[<p>Onko sinullakin Suomen yleisin ammattitauti?<br />
Moni käyttää melun torjuntaan vastamelukuulokkeita, ja se on tyhmintä mitä kuulolleen voi tehdä.<br />
<a href="https://www.iltalehti.fi/terveysuutiset/a/cfd7858a-3479-4be0-9497-f87a50f3c0c0" rel="nofollow">https://www.iltalehti.fi/terveysuutiset/a/cfd7858a-3479-4be0-9497-f87a50f3c0c0</a></p>
<p>Monilla meluisilla työpaikoilla käytetään musiikin kuunteluun tarkoitettuja vastamelukuulokkeita kuulonsuojaimina, vaikka ne eivät suojaa melulta. Asiasta tiedottaa Länsi- ja Sisä-Suomen aluehallintovirasto.</p>
<p>– Olemme törmänneet työpaikkatarkastuksissa toistuvasti tilanteeseen, jossa meluisassa työympäristössä työntekijät käyttävät omia musiikin kuunteluun tarkoitettuja kuulokkeita tai nappikuulokkeita kuulonsuojaimina. Huolimatta siitä, että näissä kuulokkeissa voi olla vastamelutoiminto, ne eivät ole lainsäädännön edellyttämiä henkilönsuojaimia, kertoo tarkastaja Rami Laine tiedotteessa.</p>
<p>Kuulonsuojainten tarkoitus on suojata kuuloa haitalliselta melulta ja estää kuulovaurion syntyminen. Suomessa meluvamma on yhä yleisin ammattitauti. Kuulonsuojaimia on käytettävä työssä aina, kun melualtistus ylittää 85 desibeliä dB(A). Työntekijä on kuitenkin oikeutettu saamaan kuulonsuojaimet käyttöön, kun melualtistus on yli 80 dB(A).</p>
<p>Melulle altistumista on rajoitettava</p>
<p>Työturvallisuuslain mukaan työntekijän altistuminen melulle on rajoitettava niin vähäiseksi, ettei siitä aiheudu haittaa tai vaaraa työntekijän turvallisuudelle tai terveydelle. Työnantajan on tunnistettava melua aiheuttavat tekijät ja selvitettävä työntekijöiden mahdollinen altistuminen melulle. Työnantajan on arvioinnin perusteella poistettava melun vaarat ja haitat tai vähennettävä niitä niin paljon kuin mahdollista.</p>
<p>Melun äänitasosta ja taajuudesta riippuen suojaimet valitaan niin, että työntekijä on melulta suojassa, mutta kuulee tarvittaessa esimerkiksi hälytys- ja varoitusäänet. Jos työssä on tarve kommunikoida, valitaan suojaimet, jotka tämän mahdollistavat.</p>
<p>– Kun suojainten käyttötarve on riskinarvioinnissa tunnistettu ja määritelty, on työntekijöiden käytettävä työnantajan tarjoamia suojaimia, Laine toteaa.</p>
<p>Jos työpaikan ääniympäristö ei edellytä kuulonsuojaamista ja työ mahdollistaa esimerkiksi musiikin kuuntelun, työnantaja voi sallia omien kuulokkeiden käytön työssä. Tällöin työnantajan on riskinarvioinnissa pohdittava kuulokkeiden käytön tuomat mahdolliset lisäriskit.</p>
<p>– Työnantaja voi riskinarvioinnin perusteella asettaa kuulokkeiden käyttöön kieltoja tai rajoituksia esimerkiksi siksi, että keskittyminen herpaantuu, varoitusääniä ei kuulla, trukkiliikennettä, painavia nostoja tai koneiden ja laitteiden epänormaalia käyttöääntä ei huomata. </p>
<p>Yleisin ammattitauti</p>
<p>Työterveyslaitoksen mukaan meluvamma on lukumäärällisesti yleisin ammattitauti Suomessa. Meluvamman aiheuttaa altistuminen yli 135-137 dB(C) impulssimaiselle melulla tai pitkäaikaiselle yli 80-85 dB(A) tasaiselle melulle.</p>
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	</item>
	<item>
		<title>By: Tomi Engdahl</title>
		<link>https://www.epanorama.net/blog/2015/01/27/introduction-to-hearing-aids/comment-page-1/#comment-1819959</link>
		<dc:creator><![CDATA[Tomi Engdahl]]></dc:creator>
		<pubDate>Sat, 23 Dec 2023 22:22:45 +0000</pubDate>
		<guid isPermaLink="false">http://www.epanorama.net/newepa/?p=29587#comment-1819959</guid>
		<description><![CDATA[https://spectrum.ieee.org/directional-hearing-aids]]></description>
		<content:encoded><![CDATA[<p><a href="https://spectrum.ieee.org/directional-hearing-aids" rel="nofollow">https://spectrum.ieee.org/directional-hearing-aids</a></p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Tomi Engdahl</title>
		<link>https://www.epanorama.net/blog/2015/01/27/introduction-to-hearing-aids/comment-page-1/#comment-1558565</link>
		<dc:creator><![CDATA[Tomi Engdahl]]></dc:creator>
		<pubDate>Fri, 11 Aug 2017 13:32:25 +0000</pubDate>
		<guid isPermaLink="false">http://www.epanorama.net/newepa/?p=29587#comment-1558565</guid>
		<description><![CDATA[Now hear this. Hearable tech takes a leap forward 
http://www.electropages.com/2017/08/hearable-tech-take-a-leap-forward/?utm_campaign=&amp;utm_source=newsletter&amp;utm_medium=email&amp;utm_term=article&amp;utm_content=Now+hear+this.+Hearable+tech+takes+a+leap+forward

Hearable technology has leapt forward recently. Kick-started by innovative new products like Doppler Lab’s Hear One earbuds and Apple’s Airpods. This exciting new category of device is redefining what a wearable should look and sound like.

Today’s most successful hearables are without doubt the Airpods from Apple. These elegant, slightly funny looking wireless earphones have changed our preconceived expectations in relation to how we listen to music. But, in reality, Airpods are just the start of the hearable story.

There are numerous new hearable devices promising to do more – much more. From enhancing our hearing, to replacing wrist-worn fitness trackers, hearables are here to stay, and their parameters go way beyond just music.

The Airpod Success

While wireless earphones have been on the market since 2015, it has taken the Apple Airpod offering to demonstrate their true potential. They rely on a few simple sensors to give them significant differentiation. Airpods use accelerometers, IR sensors and microphones and automatically connect to an iPhone via a Bluetooth connection.

While listening to music, if Airpods are taken out of the wearers ears, playback is paused courtesy of the IR sensors. When placed back again, music automatically resumes.

Microphones in each Airpod allow them to perform noise cancellation, thereby enabling speech and voice commands to be clearly heard even in noisy environments. Also Apple’s Siri voice assistant can be activated by double tapping the Airpods themselves.

All these capabilities are far from revolutionary, but it is the overall seamless execution of these devices which has made Airpods a hearable success.]]></description>
		<content:encoded><![CDATA[<p>Now hear this. Hearable tech takes a leap forward<br />
<a href="http://www.electropages.com/2017/08/hearable-tech-take-a-leap-forward/?utm_campaign=&#038;utm_source=newsletter&#038;utm_medium=email&#038;utm_term=article&#038;utm_content=Now+hear+this.+Hearable+tech+takes+a+leap+forward" rel="nofollow">http://www.electropages.com/2017/08/hearable-tech-take-a-leap-forward/?utm_campaign=&#038;utm_source=newsletter&#038;utm_medium=email&#038;utm_term=article&#038;utm_content=Now+hear+this.+Hearable+tech+takes+a+leap+forward</a></p>
<p>Hearable technology has leapt forward recently. Kick-started by innovative new products like Doppler Lab’s Hear One earbuds and Apple’s Airpods. This exciting new category of device is redefining what a wearable should look and sound like.</p>
<p>Today’s most successful hearables are without doubt the Airpods from Apple. These elegant, slightly funny looking wireless earphones have changed our preconceived expectations in relation to how we listen to music. But, in reality, Airpods are just the start of the hearable story.</p>
<p>There are numerous new hearable devices promising to do more – much more. From enhancing our hearing, to replacing wrist-worn fitness trackers, hearables are here to stay, and their parameters go way beyond just music.</p>
<p>The Airpod Success</p>
<p>While wireless earphones have been on the market since 2015, it has taken the Apple Airpod offering to demonstrate their true potential. They rely on a few simple sensors to give them significant differentiation. Airpods use accelerometers, IR sensors and microphones and automatically connect to an iPhone via a Bluetooth connection.</p>
<p>While listening to music, if Airpods are taken out of the wearers ears, playback is paused courtesy of the IR sensors. When placed back again, music automatically resumes.</p>
<p>Microphones in each Airpod allow them to perform noise cancellation, thereby enabling speech and voice commands to be clearly heard even in noisy environments. Also Apple’s Siri voice assistant can be activated by double tapping the Airpods themselves.</p>
<p>All these capabilities are far from revolutionary, but it is the overall seamless execution of these devices which has made Airpods a hearable success.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Tomi Engdahl</title>
		<link>https://www.epanorama.net/blog/2015/01/27/introduction-to-hearing-aids/comment-page-1/#comment-1445405</link>
		<dc:creator><![CDATA[Tomi Engdahl]]></dc:creator>
		<pubDate>Thu, 22 Oct 2015 08:07:01 +0000</pubDate>
		<guid isPermaLink="false">http://www.epanorama.net/newepa/?p=29587#comment-1445405</guid>
		<description><![CDATA[Hearing Aids and Batteries: A Challenge Beyond Words and Music
http://www.eetimes.com/author.asp?section_id=36&amp;doc_id=1328069&amp;

Some products, such as the latest smartphones, get lots of attention and have a lot of glamour associated with them. Yet there are large groups of products which are extremely beneficial to specific audiences and require a diverse and multidisciplinary set of engineering and production skills, but are often unrecognized in the hot-buzz world of media and product coverage.

Hearing aids are in that second group. A very readable article in a recent issue of Machine Design, &quot;Tech Advances Upgrade Hearing Aids,&quot; detailed the latest in electronics, functionality, basic types, power supply, materials used, and construction. Today&#039;s hearing aids are doing so much more than those of even just a few years ago that any engineer involved in mixed-signal applications should check it out. For example, do you know the five basic types of hearing aids? 

Hearing aids and batteries: a challenge beyond words and music
http://www.edn.com/electronics-blogs/power-points/4440618/Hearing-aids-and-batteries--a-challenge-beyond-words-and-music]]></description>
		<content:encoded><![CDATA[<p>Hearing Aids and Batteries: A Challenge Beyond Words and Music<br />
<a href="http://www.eetimes.com/author.asp?section_id=36&#038;doc_id=1328069&#038;amp" rel="nofollow">http://www.eetimes.com/author.asp?section_id=36&#038;doc_id=1328069&#038;amp</a>;</p>
<p>Some products, such as the latest smartphones, get lots of attention and have a lot of glamour associated with them. Yet there are large groups of products which are extremely beneficial to specific audiences and require a diverse and multidisciplinary set of engineering and production skills, but are often unrecognized in the hot-buzz world of media and product coverage.</p>
<p>Hearing aids are in that second group. A very readable article in a recent issue of Machine Design, &#8220;Tech Advances Upgrade Hearing Aids,&#8221; detailed the latest in electronics, functionality, basic types, power supply, materials used, and construction. Today&#8217;s hearing aids are doing so much more than those of even just a few years ago that any engineer involved in mixed-signal applications should check it out. For example, do you know the five basic types of hearing aids? </p>
<p>Hearing aids and batteries: a challenge beyond words and music<br />
<a href="http://www.edn.com/electronics-blogs/power-points/4440618/Hearing-aids-and-batteries--a-challenge-beyond-words-and-music" rel="nofollow">http://www.edn.com/electronics-blogs/power-points/4440618/Hearing-aids-and-batteries&#8211;a-challenge-beyond-words-and-music</a></p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Tomi Engdahl</title>
		<link>https://www.epanorama.net/blog/2015/01/27/introduction-to-hearing-aids/comment-page-1/#comment-1440003</link>
		<dc:creator><![CDATA[Tomi Engdahl]]></dc:creator>
		<pubDate>Thu, 01 Oct 2015 09:49:40 +0000</pubDate>
		<guid isPermaLink="false">http://www.epanorama.net/newepa/?p=29587#comment-1440003</guid>
		<description><![CDATA[Can You Hear Me Now?
http://hackaday.com/2015/09/30/can-you-hear-me-now/

It’s great to build projects just to do something neat, to learn; to impress friends and other hackers. It’s even better to address a real need.

The Aegis is targeted at prevent hearing loss, primarily in teens since they use headsets so often. It’s equally applicable to adults and pre-teens. The Aegis works by limiting the sound level emitted to 85db, which is a safe level. Above that the risk of damage to the tiny hairs in the cochlea – the inner ear – increases dramatically with a 3db increase cutting the safety time in half.


My first hearing aids were analog devices. There were three frequency bands across the audio spectrum whose volumes could be custom set for my ears — resulting in crude and limited improvements in what I could hear. My current hearing aids are technological marvels of digital signal processing with a multitude of algorithms the audiologist can use to help me hear better. 

I still need to ask people to repeat what they say at times. But who doesn’t? I had a successful career despite my loss. But it is still a royal pain-in-the-butt to miss out on one-third of the dialog in a movie, to not go to a local coffee house because I won’t understand the lyrics or comments by the musicians, and miss out on all the other small parts of life along these lines.


Devices that Extend the Body

All signs point to a coming revolution of devices that protect our bodies and make them work better. The 2015 Hackaday Prize theme is Build Something That Matters and that sentiment is obviously taking hold throughout the hardware hacker movement.]]></description>
		<content:encoded><![CDATA[<p>Can You Hear Me Now?<br />
<a href="http://hackaday.com/2015/09/30/can-you-hear-me-now/" rel="nofollow">http://hackaday.com/2015/09/30/can-you-hear-me-now/</a></p>
<p>It’s great to build projects just to do something neat, to learn; to impress friends and other hackers. It’s even better to address a real need.</p>
<p>The Aegis is targeted at prevent hearing loss, primarily in teens since they use headsets so often. It’s equally applicable to adults and pre-teens. The Aegis works by limiting the sound level emitted to 85db, which is a safe level. Above that the risk of damage to the tiny hairs in the cochlea – the inner ear – increases dramatically with a 3db increase cutting the safety time in half.</p>
<p>My first hearing aids were analog devices. There were three frequency bands across the audio spectrum whose volumes could be custom set for my ears — resulting in crude and limited improvements in what I could hear. My current hearing aids are technological marvels of digital signal processing with a multitude of algorithms the audiologist can use to help me hear better. </p>
<p>I still need to ask people to repeat what they say at times. But who doesn’t? I had a successful career despite my loss. But it is still a royal pain-in-the-butt to miss out on one-third of the dialog in a movie, to not go to a local coffee house because I won’t understand the lyrics or comments by the musicians, and miss out on all the other small parts of life along these lines.</p>
<p>Devices that Extend the Body</p>
<p>All signs point to a coming revolution of devices that protect our bodies and make them work better. The 2015 Hackaday Prize theme is Build Something That Matters and that sentiment is obviously taking hold throughout the hardware hacker movement.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: latest hearing aid technology</title>
		<link>https://www.epanorama.net/blog/2015/01/27/introduction-to-hearing-aids/comment-page-1/#comment-1432275</link>
		<dc:creator><![CDATA[latest hearing aid technology]]></dc:creator>
		<pubDate>Fri, 04 Sep 2015 06:17:27 +0000</pubDate>
		<guid isPermaLink="false">http://www.epanorama.net/newepa/?p=29587#comment-1432275</guid>
		<description><![CDATA[School districts that have the means to offer hearing children an extracurricular course in sign language can help to foster communication and friendships for students 
with hearing difficulties. 5. Learning ASL can benefit those who are 
hearing impaired as well as students who can hear because speaking and signing 
instruction better addresses the learning styles of visual, kinesthetic, and 
auditory learners.]]></description>
		<content:encoded><![CDATA[<p>School districts that have the means to offer hearing children an extracurricular course in sign language can help to foster communication and friendships for students<br />
with hearing difficulties. 5. Learning ASL can benefit those who are<br />
hearing impaired as well as students who can hear because speaking and signing<br />
instruction better addresses the learning styles of visual, kinesthetic, and<br />
auditory learners.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Tomi Engdahl</title>
		<link>https://www.epanorama.net/blog/2015/01/27/introduction-to-hearing-aids/comment-page-1/#comment-1334315</link>
		<dc:creator><![CDATA[Tomi Engdahl]]></dc:creator>
		<pubDate>Wed, 28 Jan 2015 07:14:36 +0000</pubDate>
		<guid isPermaLink="false">http://www.epanorama.net/newepa/?p=29587#comment-1334315</guid>
		<description><![CDATA[Analog/Digital Hearing Aid with Bluetooth Compatibility
http://schematics.com/project/analogdigital-hearing-aid-with-bluetooth-compatibility-14515/

This circuit provides support to people that have hearing impairment. It is capable of receiving analog and digital signals. It also features immunity to noise that it will not turn ON unless a certain threshold of signal is reached.

The design is comprised of LM324 quadruple operational amplifier that operates with the NE555 timer for sound detection.

The digital side of the design is comprised of HC-05 Bluetooth module that act as transceiver of digital data. The SC18IM700 I2C bus controller with UART interface relates the Bluetooth module to the PCF8591P. The PCF8591P 8-bit A/D and D/A converter translates the digital signal to analog signal for the speaker output.]]></description>
		<content:encoded><![CDATA[<p>Analog/Digital Hearing Aid with Bluetooth Compatibility<br />
<a href="http://schematics.com/project/analogdigital-hearing-aid-with-bluetooth-compatibility-14515/" rel="nofollow">http://schematics.com/project/analogdigital-hearing-aid-with-bluetooth-compatibility-14515/</a></p>
<p>This circuit provides support to people that have hearing impairment. It is capable of receiving analog and digital signals. It also features immunity to noise that it will not turn ON unless a certain threshold of signal is reached.</p>
<p>The design is comprised of LM324 quadruple operational amplifier that operates with the NE555 timer for sound detection.</p>
<p>The digital side of the design is comprised of HC-05 Bluetooth module that act as transceiver of digital data. The SC18IM700 I2C bus controller with UART interface relates the Bluetooth module to the PCF8591P. The PCF8591P 8-bit A/D and D/A converter translates the digital signal to analog signal for the speaker output.</p>
]]></content:encoded>
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