The No.1 Website for Pro Audio
 Search This Thread  Search This Forum  Search Reviews  Search Gear Database  Search Gear for sale  Search Gearslutz Go Advanced
Tags: , ,

My "Binaural" dummy head project
Old 24th February 2014
  #1
Gear Head
 
b3nway's Avatar
 

Thread Starter
My "Binaural" dummy head project

Hi,
I have built a "binaural" dummy head.
This is a very cheap and funny DIY project.
Obviously results are poor, compared to state of the art (Neumann KU100)...
Anyway, listen and judge.
https://soundcloud.com/resoundingsounds

Thanks.
Giorgio.
Old 24th February 2014
  #2
Gear Head
 
b3nway's Avatar
 

Thread Starter
Old 25th February 2014
  #3
What you did is good fun, and it shares the feeling of adventure. Imagine something, build or buy it, then test it. I thought your phone ringing sample had a nice open sound -- even though I was listening to it with my laptop. Well done.
Old 25th February 2014
  #4
Gear Head
 
b3nway's Avatar
 

Thread Starter
Quote:
Originally Posted by jacktadoussac View Post
your phone ringing sample had a nice open sound -- even though I was listening to it with my laptop. Well done.
Thank you!
Are you listening with the headphones?
Old 26th February 2014
  #5
Gear Head
 
b3nway's Avatar
 

Thread Starter
here is the classic "matchbox" Test.

Old 26th February 2014
  #6
No actually it was through the tinny speakers of the laptop. It's one of the problems with specialist recordings.
Old 26th February 2014
  #7
Gear Head
 
b3nway's Avatar
 

Thread Starter
Quote:
Originally Posted by jacktadoussac View Post
No actually it was through the tinny speakers of the laptop. It's one of the problems with specialist recordings.
Please try with headphones: is very important to obtain accurate 3D effect.
Any kind of cheap earphones will work.



Thanks.

Giorgio.
Old 28th February 2014
  #8
Sounds fine to me! What microphones are inside the head?
Old 28th February 2014
  #9
Gear Head
 
b3nway's Avatar
 

Thread Starter
Quote:
Originally Posted by daniel@mineral View Post
Sounds fine to me! What microphones are inside the head?
Thanks!
Microphones are Panasonic wm-61a
Old 28th February 2014
  #10
Lives for gear
 
RobAnderson's Avatar
Glad to see this thread.

I recently pulled out my old CPR mannequin and converted it for dummy head work. I stuffed the head with foam, put a quick release mic clip in the throat, and mounted two DPA 4060's where the ears should go.

Sounded WAY better than it should have - I might be hooked. I think my biggest problem is trying to tell the client why they need a head on a mic stand during the concert

My problem at the moment is that I have no pinnae on it, and have not yet figured out a way to make this happen, so I do not get the full 3D effect.

I see that yours is rather detailed - where/how did you get the pinnae made?
Old 28th February 2014
  #11
Lives for gear
 
boojum's Avatar
Quote:
Originally Posted by RobAnderson View Post
My problem at the moment is that I have no pinnae on it, and have not yet figured out a way to make this happen, so I do not get the full 3D effect.
You can take molds of your own pinnae and cast soft plastic pinnae from that. The materials would be similar or the same as used in life masks.
Old 28th February 2014
  #12
nkf
Lives for gear
 

When I don't have the Neumann KU-100, I use the Sennheiser dummy head with a pair of DPA 4060s … sounds very, very good …
Technically a bad photo but it shows that the 4060s with the foam wind protection fit perfectly into the ear holes of this dummy head:

Old 28th February 2014
  #13
Geariophile
 
Karloff70's Avatar
 

What's the noise level of those 4060's like used like that? Aren't they a bit hissy from afar?
Old 28th February 2014
  #14
nkf
Lives for gear
 

Quote:
Originally Posted by Karloff70 View Post
What's the noise level of those 4060's like used like that? Aren't they a bit hissy from afar?
Those are NOT the 4061s and I was recording New Year fireworks … generally I think there is not a big noise issue with the 4060s and I'm very picky concerning noise/hiss. And the dummy head was just a comparison add on to my IRT Cross with four KM184Ds ...
Old 1st March 2014
  #15
Gear Head
 
b3nway's Avatar
 

Thread Starter
Quote:
Originally Posted by RobAnderson View Post
Glad to see this thread.

I recently pulled out my old CPR mannequin and converted it for dummy head work. I stuffed the head with foam, put a quick release mic clip in the throat, and mounted two DPA 4060's where the ears should go.



My problem at the moment is that I have no pinnae on it, and have not yet figured out a way to make this happen, so I do not get the full 3D effect.

I see that yours is rather detailed - where/how did you get the pinnae made?
Hi,
the material inside the head is very important.
I used pieces of heavy fabric and lot of rubber, which is comparable to human flesh.
I'm planning to put inside a big piece of wood or plastiline, to improve the density and avoid the internal sound propagation (resonance,crosstalk...) .

pinnae are made of silicon rubber, you can find here on ebay:

Artificial Ear Model Accessory Real Ear Display Salesman Sample Silicon 1pc | eBay





Regards,

Giorgio.
Old 1st March 2014
  #16
Lives for gear
 
RobAnderson's Avatar
Quote:
Originally Posted by b3nway View Post
Hi,
the material inside the head is very important.
I used pieces of heavy fabric and lot of rubber, which is comparable to human flesh.
I'm planning to put inside a big piece of wood or plastiline, to improve the density and avoid the internal sound propagation (resonance,crosstalk...) .

pinnae are made of silicon rubber, you can find here on ebay:


Regards,

Giorgio.
Thanks Giorgio!

I used a few different types of foam packed in very densely. It seems to be doing the job.

Of greater concern to me is the fact that the head itself is made of hard molded plastic, but it does not seem to be a problem in practice.
Old 1st March 2014
  #17
Gear Head
 
b3nway's Avatar
 

Thread Starter
Quote:
Originally Posted by RobAnderson View Post
Thanks Giorgio!

I used a few different types of foam packed in very densely. It seems to be doing the job.

Of greater concern to me is the fact that the head itself is made of hard molded plastic, but it does not seem to be a problem in practice.
here you can see the dummy head in action.
Sorry, only Italian language for now ( English sutitles are coming soon)
The Matchbox test is @ 4:40

Old 1st March 2014
  #18
Lives for gear
 
boojum's Avatar
Quote:
Originally Posted by RobAnderson View Post
Thanks Giorgio!

I used a few different types of foam packed in very densely. It seems to be doing the job.

Of greater concern to me is the fact that the head itself is made of hard molded plastic, but it does not seem to be a problem in practice.
Our heads are made of bone and stuffed with soft stuff.
Old 1st March 2014
  #19
I built one years ago and was astonished at how well it presented directional information when listening on headphones. I stuck it out of my window and heard someone putting keys into a lock. I looked where I heard the sound to be - and was looking at the keys in his hand. Quite extraordinary

I don't think the material of the head or the pinnae are important but the diameter of the head and the mic spacing are. I used a plastic disc about 7" in diameter (where could I have got one of those from??), bent coat hanger wire and two electret microphone capsules spaced about 6" apart

It's a great experiment as it shows how much information is carried in phase relationships between the two signals. It also demonstrates how irrelevant the frequency response of the mics is to the binaural effect. The ones I used were about £1 each and fed by a 1.5 Volt battery

Nick Froome
Old 1st March 2014
  #20
Gear Head
 
b3nway's Avatar
 

Thread Starter
Quote:
Originally Posted by bolide View Post

I don't think the material of the head or the pinnae are important but the diameter of the head and the mic spacing are.

Nick Froome
In this prototype I'm using the HRTF approach and the material of the head is important.
Old 2nd March 2014
  #21
Lives for gear
 
RobAnderson's Avatar
Quote:
Originally Posted by boojum View Post
Our heads are made of bone and stuffed with soft stuff.
Sadly, my head may be denser with bone than with the soft stuff at times...
Old 2nd March 2014
  #22
Lives for gear
 
boojum's Avatar
Quote:
Originally Posted by b3nway View Post
In this prototype I'm using the HRTF approach and the material of the head is important.
Do you plan on putting a wig on the head and possibly adding a torso with a sweater or sweatshirt? From my readings these all improve the HRTF function. And with all that you will definitely need to name him.

We have a fellow on the board who is quite active with binaural. I am surprised he has not chimed in yet. Hopefully soon. He is quite knowledgeable and has been working with this for some years.

Mark, where are you???
Old 28th March 2014
  #23
Gear Head
 
b3nway's Avatar
 

Thread Starter


The last week I recorded this choir in a local theatre near my town.
Please listen this recording with headphones.
The piano is well focused on the left side and percussion on front.
Enjoy.

Giorgio.
Old 29th March 2014
  #24
Lives for gear
 
Thomas W. Bethe's Avatar
Years ago a headphone company made a pair of headphones with microphones built into the headphones so you could wear the headphones to monitor with and at the same time use the microphones for recording. Seemed like a good idea at the time. I was never sure how they kept the microphones from picking up the headphone audio but they seemed to work. I think the manufacture was JVC. I owned a pair but sold them. It also had a dummy head included that had a 5/8"-27 threaded hole in the bottom for mounting on a mic stand. I have also seen glasses with built in microphones for use with Zoom type recorders when you want to record a concert without drawing attention to yourself.
Old 29th March 2014
  #25
Gear Head
 
b3nway's Avatar
 

Thread Starter
Quote:
Originally Posted by Thomas W. Bethe View Post
I have also seen glasses with built in microphones for use with Zoom type recorders when you want to record a concert without drawing attention to yourself.
Seems interesting but you must pay attention to noises : a sneeze, a cough, until your breath.
I still prefer the dummy head approach.
Old 6th May 2014
  #26
Gear Head
 
b3nway's Avatar
 

Thread Starter
Old 14th April 2017
  #27
Gear Head
 

Old 14th April 2017
  #28
Quote:
Originally Posted by sax512 View Post
Some of you might find my ear models helpful for your DIY binaural microphone projects.

www.shapeways.com/shops/binaural-microphone-ears

They have an anatomically accurate ear canal already built in.
Do you have any recordings using these you can share?

..ant
Old 14th April 2017
  #29
Gear Head
 

Hi Ant.

Yes, I do. Please PM me. I'll send you a link to a Dropbox folder.
Topic:
Post Reply

Welcome to the Gearslutz Pro Audio Community!

Registration benefits include:
  • The ability to reply to and create new discussions
  • Access to members-only giveaways & competitions
  • Interact with VIP industry experts in our guest Q&As
  • Access to members-only sub forum discussions
  • Access to members-only Chat Room
  • Get INSTANT ACCESS to the world's best private pro audio Classifieds for only USD $20/year
  • Promote your eBay auctions and Reverb.com listings for free
  • Remove this message!
You need an account to post a reply. Create a username and password below and an account will be created and your post entered.


 
 
Slide to join now Processing…
Thread Tools
Search this Thread
Search this Thread:

Advanced Search
Forum Jump