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| knowledge:artificial_ear [2017/09/03 01:11] – created mrkva | knowledge:artificial_ear [2017/09/03 01:12] (current) – mrkva | ||
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| B&K 4157 “ear simulator” which is designed to simulate the impedance of the ear canal and make accurate measurements at the insert point | B&K 4157 “ear simulator” which is designed to simulate the impedance of the ear canal and make accurate measurements at the insert point | ||
| - | Now this doesn’t directly help you out since we’re on opposite coasts, and you don’t want to mail your hearing aid to me and I don’t want to mail my 4157 to you. But its amusing to consider making a cheap copy of the 4157. I’m thinking out loud in print here. We would need a device that has a close resemblance to the impedance of the ear canal. Back in the old days people used to use a device called a Zwislocki coupler. The Zwislocki was extremely difficult to make and is now known not to be a close approximation to real ears. Not only that, different ears are significantly different in terms of their acoustic parameters. Here is an article which discusses some of the above. | + | I’m thinking out loud in print here. We would need a device that has a close resemblance to the impedance of the ear canal. Back in the old days people used to use a device called a Zwislocki coupler. The Zwislocki was extremely difficult to make and is now known not to be a close approximation to real ears. Not only that, different ears are significantly different in terms of their acoustic parameters. Here is an article which discusses some of the above. |
| https:// | https:// | ||