good lecture mic for long distance

[Ty Ford]

Hello Avner and welcome to the Cow Audio Forum.

Rather than a boundary mic, I’d go with an ear-worn mic like the Countryman E6.

https://www.countryman.com/earset-microphone/

What will it plug into?

Regards,

Ty Ford
Cow Audio Forum Leader

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[Al Bergstein]

Ty, would you recommend an Omni directional or a hypercardoid capsule for that type of Mic requirement?

Al

[Avner Da]

thanks ty for the fast answer.
i thought on this idea but i forgot to say that the teacher don’t want to put on himself mic. (he want mic on the table or on stand)

[Ty Ford]

Hey Al,

My E6 are all omni. The directional version may be useful in extreme noise situations, or when you also have that mic running through a very loud and nearby PA system that’s also amplifying the voice, but because the mic element is so close to your mouth, the voice level is usually relatively a lot higher over the noise floor. You can back off the mic preamp and stay away from feedback.

Regards,

Ty Ford
Cow Audio Forum Leader

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[Ty Ford]

Hi Avner,

Obviously your teacher is not a physics teacher.

No. A Boundary mic at that distance will not help you. Is there a PA system in the room that amplifies his voice?

Regards,

Ty Ford
Cow Audio Forum Leader

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Ty Ford Blog: Ty Ford\’s Blog

[Avner Da]

yes, now we are using normal mic (dynamic) with stand but the the sound is not so clear (becuase ther distance between the mic and the teacher), and the teacher want the mic to be much further from him.
do you know a goose neck condesner mic that will be good for this?
thanks!

[Ty Ford]

Dear Avner,

Your talent should not be in charge of your equipment decisions.

You are asking for 30 inches, with a soft voice. The normal distance for someone with a regular voice is 12 to 18 inches.

You can always have him buy the wrong mic, prove to him that it doesn’t work and then buy the right one.

I repeat; something like a Countryman E6 on your talent will work.

Why does he not want the ear-worn mic?

Regards,

Ty Ford
Cow Audio Forum Leader

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Ty Ford Blog: Ty Ford\’s Blog

[Bruce Watson]

[avner da] “now we are using normal mic (dynamic) with stand but the the sound is not so clear (because the distance between the mic and the teacher), and the teacher want the mic to be much further from him.”

So the teacher wants the Universe to grant him a permit to violate for the laws of physics? Tell him the Universe said “er… no”.

The bottom line here is that he wants you to do the impossible. The way to increase signal-to-noise ratio (to increase understandability) is to move the mic closer to the signal source (his soft-spoken mouth). And the way to do that is for him to wear a mic, whether he wants to or not. And I’m with Ty, the best thing you can do for him is an ear-set mic, putting the mic right at the corner of his mouth.

Moving the mic farther away is just going to make the situation worse, no matter what mic you use.

[Richard Crowley]

It was never clear whether the question here refers to RECORDING the lecure, or whether it is about REINFORCEMENT of the sound during presentation of the lecture.

But in either case a distant microphone technique, ESPECIALLY in a typical reverberent school classroom is for all practical purposes unworkable and not worth the effort to even try it.

If you are talking about RECORDING, then perhaps putting one of those Bluetooth microphone transmitters in the pocket of the lecturer might work.

But for REINFORCEMENT, you are unlikely to find ANY kind of microphone that would work at a distance of more than 30-40cm. If your instructor is unwilling to understand the laws of acoustic physics, then separate yourself from this dillemma as fast as possible and run away. There is no suitable solution for your questions with the unworkable limitations imposed.

———————————————————————————
Recording audio without metering and monitoring is exactly like framing and focusing without looking at the viewfinder.

[Avner Da]

thanks for the answer, we are recording the lectures via philips dvt2010 that we put on the table and it’s word well.
the problem is with the reinforcment of the sound (as you said rightly), the current solution with the dynamic mic works but we try to improve the sound quality as we are able.
so the option for the neck mic is problem because the teacher disagree, the question is if there option that will work better then the dynamic mic.
thanks for the helpful answers!