Excellent video in all respects. The narrator explained everything clearly and the animation of how the sound waves bounce off the curved dish helped me understand how it works. Thank you!
Tested the parabola on willow warblers with an analogue Nagra recorder many years ago. Completelly blew my mind. Today I am struggling with my ZOOM H5. As you say it's not a very convenient thing to carry around if you are backpacking and want to carry photo equipment to. But if you are into bird recordings I cant think of anything better than parabola recordings.
Very nicely explained. What is the recording device that is being used in this video? And would you recommend any brands for the microphone and the recording device?
At 3:20 you say that any wavelength longer than the dish diameter won't be reflected. I just want to clarify that this is not a sharp cutoff. The gain of the dish is proportional to the (ratio of dish diameter to wavelength) squared. At a wavelength = (Diameter/π), the gain = 1. Quarter that wavelength, the gain = 2, etc. At gains above 20-25 dB, the curve flattens out and produces diminishing returns.
@@ElbertPoling a 12 inch dish will have unity gain around 3500 Hz. Very far from infrasound. Infrasound is generally accepted to be below 20 Hz. For this frequency you'd need a dish about 175 ft in diameter.
@@gizmoguyar Thanks for this clarification. If I'm understanding correctly, this would mean that under 3500 Hz, a 12" dish will have diminishing returns, correct? And so to accurately represent the sound in the field, you would need some equalization? Can you tell me what unity gain would be for a 9" parabola? It seems to me that missing those low frequencies is a really big deal. Thanks!
Yep. That's right. At lower frequencies the dish starts behaving as if it doesn't exist. So it would be as if only the microphone existed. I think it usually the loss of the lower frequencies is a big deal. Depends on the use case. For news crews on the sides of football fields, a 3 foot dish might be just fine for understanding speech. But not for accurate reproduction. Unity gain occurs when the wavelength = dish diameter / pi. So 9/3.14 = 2.86 inches wavelength. This is a frequency of about 4,750 Hz according to online calculators.
thank you for the video! my question: considering that a parabola doesnt reflect waves that aren't perpendicular to the focus, would it then be correct to say that, if you used a parabola in an echo-y room, provided the echoes dont bounce back to a perpendicular position, you would then in theory be able to reject or reduce the amount of echo captured?
I loved your review. Have you done any recording of ocean wave sounds? What kind of microphone are you using on that rig? THanks in advance for your reply.
Hey, looks like you never got a reply. But I saw him use this setup in another video, "How to Record Audio - The Basics." He says what mic and setup he's using at the end.
Where did you get your parabolic reflector? I cannot seem to find them online with the exception of the PRO models and they are expensive. Suggestions? 3:46
This is a very good and a concise presentation. Thank you. It's very informative. While watching this, I had an idea...and I suppose others may have thought of it before. But...why not mount the whole system on a tripod with a proper head? I understand the dish is large, but it could be engineered using an arm. Seems to me that just like with a camera, a tripod would lend stability and directionability (did I just make a new word?) to acoustic target acquisition and tracking. Actually, now that my mind is really working, one could pan and tilt the parabolic mic to create a sonic space like a camera uses cinematography to visually create a scene. Then if you had a nice camera with the proper lense, imagine the movie one could make with synchronized visual and audio from telephoto positions. Just a thought.
And imagine, if you had a multi-range aiming system for this paranoic mic-telephoto camera arrangement. What if you put a laser on the mic that went straight ahead? And what if this laser was is the visual range that is difficult for animals to see but that a FLIR monocle could see easily? So you have the green laser on the mic and the FLiR monocle on the camera, and then you have a system where you can put the green laser at the center of the FLIR monocle. So how amazing could the synchronization of video and audio at significant distances be? Mind-blowing, I think.
3:20, Could anyone please explain why sound waves with a wavelength longer than the dish can not be reflected? I thought the sound wave's wavelength does not affect the reflection coefficient.
Thank you for this great lesson, I have my vintage shotgun, I have violated the directv tos, and I am gonna finally get a clear record of those foxes always having sex down by the creek
what kind of mic (pickup pattern) is at the center of the parabola? what are its advantages over the shotgun mics? for a newbie, with a tiny budget, does it present more versatility than a shotgun?
Usually a cardioid or omnidirectional is used. But a parabola does not give you much versatility. It is good at one thing only: Isolating and enhancing a particular sound source at a distance. A shotgun microphone is less effective for that, but is usable for at lot of more. It's primary use is for booming above the head of an actor, newscaster, vlogger etc. pointing down at him from just outside the picture.
what happens when something close interferes with the parabola? I'm not sure it exists but I'm looking for something that only picks up far away and nulls anything closer.
Does anyone know what parabolic reflector he's using in this video? Does anyone know where I can buy one exactly like it, or very similar to it? Is there a model number for it?
For a parabola you shouldn't use a shotgun mic like the NTG1. An omnidirectional or cardioid microphone is required. Like an NT5, NT45 or NT55. Unless I'm mistaken, a Sennheiser ME62 (or maybe ME64) is used with a Telinga disc kit here. Price around $1200 for the whole kit, I think, including the microphone which must be bought separately.
some parabolic "ears" are $2000! ish . . are there any for $250 ea? to reach twenty feet away? . . how would i mic five people talking . . clearly, without overdubbing?
ok. . parabola for $20,000 . . how can you up your smartphone game to $20,OOO. . rob a bank, right?? youtube has many "how to make your own parabolic dishes for "$3O"!!!!
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Excellent video in all respects. The narrator explained everything clearly and the animation of how the sound waves bounce off the curved dish helped me understand how it works. Thank you!
Tested the parabola on willow warblers with an analogue Nagra recorder many years ago. Completelly blew my mind. Today I am struggling with my ZOOM H5. As you say it's not a very convenient thing to carry around if you are backpacking and want to carry photo equipment to. But if you are into bird recordings I cant think of anything better than parabola recordings.
Very nice Greg. Love the graphics. Wonderfully instructive.
Good video. Love the Cornell bird lab :)
Thank you so much! It's a beautiful video and a very clear explanation.
Love the video, excellent job. Great information!
Great video. Yours was the only one on RUclips that touched on all these points. Thank you so much!
Very informative. Thanks.
Very nicely explained. What is the recording device that is being used in this video? And would you recommend any brands for the microphone and the recording device?
Best app and organization ever.
Excellent sir
Great explanation
what is the best material for reflecting sound?
Thanks for the video. Hoping to try one soon.
amazing, thank you!
Awesome video. Now I want one!
You are lucky!! Because you have the sennheiser hd25, very good choice
I can understand in which the Direction of His Viewpoints as Well.
At 3:20 you say that any wavelength longer than the dish diameter won't be reflected. I just want to clarify that this is not a sharp cutoff. The gain of the dish is proportional to the (ratio of dish diameter to wavelength) squared. At a wavelength = (Diameter/π), the gain = 1. Quarter that wavelength, the gain = 2, etc. At gains above 20-25 dB, the curve flattens out and produces diminishing returns.
With all of that said, would a 12" parabola capture infrasound?
@@ElbertPoling a 12 inch dish will have unity gain around 3500 Hz. Very far from infrasound. Infrasound is generally accepted to be below 20 Hz. For this frequency you'd need a dish about 175 ft in diameter.
@@gizmoguyar Wow! And now I know the REST of the story. Thanks!
@@gizmoguyar Thanks for this clarification. If I'm understanding correctly, this would mean that under 3500 Hz, a 12" dish will have diminishing returns, correct? And so to accurately represent the sound in the field, you would need some equalization? Can you tell me what unity gain would be for a 9" parabola? It seems to me that missing those low frequencies is a really big deal. Thanks!
Yep. That's right. At lower frequencies the dish starts behaving as if it doesn't exist. So it would be as if only the microphone existed. I think it usually the loss of the lower frequencies is a big deal. Depends on the use case. For news crews on the sides of football fields, a 3 foot dish might be just fine for understanding speech. But not for accurate reproduction. Unity gain occurs when the wavelength = dish diameter / pi. So 9/3.14 = 2.86 inches wavelength. This is a frequency of about 4,750 Hz according to online calculators.
Awesome video. Like to know quality parabolic reflector brands
Thanks!!
so clear, thanks.
Thanks! Stellar explanation of how and why a parabola works, and its benefits and limitations.
yes, this helps a lot. thank you.
great vid, thanks!
Great video!
Awesome video - thank you!
wow again excellent video.
can you please tell mw the which parabolic reflector you used????
Very informative and your explanation was excellent, thank you 🙏👍
thank you for the video! my question: considering that a parabola doesnt reflect waves that aren't perpendicular to the focus, would it then be correct to say that, if you used a parabola in an echo-y room, provided the echoes dont bounce back to a perpendicular position, you would then in theory be able to reject or reduce the amount of echo captured?
Thanks you very much! It was very usefull!
Thank you:)
Very well done video. 👌
very valuable advice
Can you tell me the parabola parameters best for recording thunder
From what distance does it work?
my boi looks like my teacher without glasses
where to buy such a device?
I loved your review. Have you done any recording of ocean wave sounds? What kind of microphone are you using on that rig? THanks in advance for your reply.
Hey, looks like you never got a reply. But I saw him use this setup in another video, "How to Record Audio - The Basics." He says what mic and setup he's using at the end.
Where did you get your parabolic reflector? I cannot seem to find them online with the exception of the PRO models and they are expensive. Suggestions? 3:46
This is a very good and a concise presentation. Thank you. It's very informative.
While watching this, I had an idea...and I suppose others may have thought of it before. But...why not mount the whole system on a tripod with a proper head? I understand the dish is large, but it could be engineered using an arm.
Seems to me that just like with a camera, a tripod would lend stability and directionability (did I just make a new word?) to acoustic target acquisition and tracking.
Actually, now that my mind is really working, one could pan and tilt the parabolic mic to create a sonic space like a camera uses cinematography to visually create a scene. Then if you had a nice camera with the proper lense, imagine the movie one could make with synchronized visual and audio from telephoto positions.
Just a thought.
And imagine, if you had a multi-range aiming system for this paranoic mic-telephoto camera arrangement. What if you put a laser on the mic that went straight ahead? And what if this laser was is the visual range that is difficult for animals to see but that a FLIR monocle could see easily?
So you have the green laser on the mic and the FLiR monocle on the camera, and then you have a system where you can put the green laser at the center of the FLIR monocle. So how amazing could the synchronization of video and audio at significant distances be?
Mind-blowing, I think.
What do you use to record the sounds from the mic/dish combo??
thanks
I am looking for a microphone to record the sounds of nature on land, sea and birds
Brother what is the name of the microphone?
Thank you
very intersting, do you think stereo xy mic is good with parabol ?
Can you use this to make movies? how would you sync the sound with your video recording?
How to buy this from India?
3:20, Could anyone please explain why sound waves with a wavelength longer than the dish can not be reflected? I thought the sound wave's wavelength does not affect the reflection coefficient.
Which Parabolic Microphone is the best?
you could compare this to a camera optical zoom vs digital zoom. This is an optical zoom
How long distance you can hear others with that?
Thank you for this great lesson, I have my vintage shotgun, I have violated the directv tos, and I am gonna finally get a clear record of those foxes always having sex down by the creek
what kind of mic (pickup pattern) is at the center of the parabola? what are its advantages over the shotgun mics? for a newbie, with a tiny budget, does it present more versatility than a shotgun?
Usually a cardioid or omnidirectional is used. But a parabola does not give you much versatility. It is good at one thing only: Isolating and enhancing a particular sound source at a distance. A shotgun microphone is less effective for that, but is usable for at lot of more. It's primary use is for booming above the head of an actor, newscaster, vlogger etc. pointing down at him from just outside the picture.
1-Larger the bowl/dish the further away you can hear?
OR
2-Wider bowl/dish the better the distance?
Stop spam copy pasting every video.
Anyone know what parabolic reflector he's using in this video?
I looks very much like a Telinga disc kit. A Sennheiser ME62 or ME64 is recommended for it.
Whats is the price of this shotgun ?
I need to buy this, where i can buy this product in india ?
Contactin to sound analysis & detection.
i never knew this existed. would this work with a shotgun microphone from a farther than normal distance so I can monitor audio on a budget?
Omnidirectional microphones are preferred for parabolic microphone systems.
what happens when something close interferes with the parabola? I'm not sure it exists but I'm looking for something that only picks up far away and nulls anything closer.
Does anyone know what parabolic reflector he's using in this video?
Does anyone know where I can buy one exactly like it, or very similar to it?
Is there a model number for it?
Did you find out?
@@amnotthefather1518
No, I did not
@@charliedroves5610
Thank you Sir!
Would you please send me a link to the Cornell product list or website, I can't seem to find it
Help me please I want the name
could i reach thirty feet with a $250 parabola? and an ntg1?
For a parabola you shouldn't use a shotgun mic like the NTG1. An omnidirectional or cardioid microphone is required. Like an NT5, NT45 or NT55. Unless I'm mistaken, a Sennheiser ME62 (or maybe ME64) is used with a Telinga disc kit here. Price around $1200 for the whole kit, I think, including the microphone which must be bought separately.
I want it use it on the other room..
some parabolic "ears" are $2000! ish . . are there any for $250 ea? to reach twenty feet away? . . how would i mic five people talking . . clearly, without overdubbing?
I find it difficult to communicate because I am translating from Arabic to English
whos is here after playing Phasmophobia :P
The FBI / CIA use these devices.
Why are the FBI/CIA interested in what the birds are saying?
@ + ...plot twist......you are the bird.
ok. . parabola for $20,000 . . how can you up your smartphone game to $20,OOO. . rob a bank, right?? youtube has many "how to make your own parabolic dishes for "$3O"!!!!
Phasmophobia