Re: Individualized HRTF measurements

Hi Thibaud, years ago i carried out HRTF's measurements using microphones Knowles FG3329 and I have used other similar microphones by the same company. You can find a description of the procedure in http://www.isr.umd.edu/Labs/NSL/Files/grassi_ICAD2003.pdf

The microphones were surrounded by a layer of swimming ear plug silicon and then embedded into silicon moulding material (normally used for making ear impressions for hearing aids). The compound hardens within minutes, conforming to the shape of the ear canal and sealing it.

For hygiene purposes, the ear molding impression material was changed for each subject (also to have a better seal of the earcanal). The microphone itself never came into contact with the ear canal, and we cleaned the wires with alcohol.

Hope this helps, good luck with your measurements.

-elena

On Fri, Mar 4, 2016 at 2:52 AM, Thibaud <thibaud.leclere@xxxxxxxxxx> wrote:

Dear List,

I intend to carry out some individualized HRTF measurements. I thought some device would exist in purpose of such measurement by including tiny microphones and a system to maintain their position into the ear canal but I feel more like each team uses its “homemade” setup… I only saw a “binaural microphone” designed by Bruel and Kjaer which is very expensive.

I was then wondering what microphone do you use/propose/advice for individualized HRTF measurements ? Do you also know a way to hold the microphone in position during the measurement procedure ? And finally, do you use any type of protection in between the microphone and the ear canal in order to avoid a direct contact and then get the measurement more hygienic (given that the microphones will inserted in several subjects’ ear canals…) ?

Any help or advice on these matters would be very appreciated.

Thank you very much by advance,

Thibaud LECLERE

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