recording low frequency sound with a microphone

[Brian]

What type of microphone records at very low frequency.
Often when playing movies there are very low frequency sounds heard on a
sub woofer but the frequency seems to be very low for a microphone to
capture.

--
Regards Brian

[Phil Allison]

"Brian"

** Sounds effects used in movies are often electronically synthesised, not
real sounds.

Deep thuds and rumbling noises are easily created to match with the action
in a movie.

No microphones were ever involved.


... Phil

[Phil Allison]

"Brian"

>
> What type of microphone records at very low frequency.

** Almost any condenser mic.

Most of the large diaphragm types have frequency responses that extend below
the audio band - hence the need for elaborate shock mounts and anti wind /
breath measures.



... Phil

[geoff]

"Brian" <bcl...@es.co.nz> wrote in message
news:323986194370313358.3...@free.teranews.com...

Pretty much any condensor mic.

geoff

[oldp...@spamsucks.net]

Wtf has this got to do with sound reinforcement?

[JohnM]

Those movie sounds may not have been captured by a microphone at all.

[Brian]

Approx what is the lowest freq. can a condensor mic can record?

>
> geoff


--
Regards Brian

[gregz]

If you got a sealed back omni, it goes down to practically ZERO frequency.
A cardioid will have a lot higher limit on low response.

It will actually measure pressure. If you got a big air handler, it will
frequently show those pressure changes below 20 hz.

Greg

[Phil Allison]

"Brian"

> Approx what is the lowest freq. can a condensor mic can record?

** Mics do not record anything - they are just the first step in the
recording chain.

Your dopey Q has been answered.

Kindly go waste someone else's time.

And the word is " condenser ".


... Phil

[kroo...@gmail.com]

Since you're being pedantic, I'll submit you're wrong. The audio *source* is the first step in the recording chain. Can't recording anything without a source.

[FatBoySlimFast]

<kroo...@gmail.com> wrote in message
news:fcf09ddd-7672-4978...@googlegroups.com...

> Since you're being pedantic, I'll submit you're wrong.
> The audio *source* is the first step in the recording chain.
> Can't recording anything without a source.

You just can't stop being clueless.

By that argument you could equally say that the big feckin' bang was the
first step ...

Steve W

[Brian]

Thanks for your answer Greg.
I was just curious.

--
Regards Brian

[Brian]

To educate the mind you need to ask questions.
In this case I was curious.

--
Regards Brian

[Phil Allison]

"Brian" <bcl...@es.co.nz
"Phil Allison":

>> "Brian"
>>
>>> Approx what is the lowest freq. can a condensor mic can record?
>>
>>
>> ** Mics do not record anything - they are just the first step in the
>> recording chain.
>>
>> Your dopey Q has been answered.
>>
>> Kindly go waste someone else's time.
>>
>> And the word is " condenser ".
>>
>>
>

> To educate the mind you need to ask questions.

** You need to ask relevant and insightful ones to gain understanding.

That leaves Kiwi nincompoops like you out completely.



... Phil

[Brian]

You did start to answer my questions at the start of the thread. I wonder
why the sudden change of heart. Maybe you misunderstood me.

--
Regards Brian

[Brian]

You can call me names but that does not stop me from asking questions on
this newsgroup.
Have you got something against Kiwis?

--
Regards Brian

[Flint]

I see Phil is being a phucktard again and a wildly PEDantic asshole to
someone simply asking a question.

Guess we should call you 'PEDoPhil'.




--
MFB

[kroo...@gmail.com]

You just made my point for me, douche bag.

xo
- K

[Phil Allison]

"Brian" <bcl...@es.co.nz>

> You did start to answer my questions at the start of the thread.

** Try using Google.

You PITA stupid fuck !!

[Brian]

Ignoring your language...
Google does not have the answer to everything.
Try asking google how you overcome the problem of recording audio in a room
that has air conditioner noise.

--
Regards Brian

[Phil Allison]

"Brian" <bcl...@es.co.nz>

** Another rabid, sheep fucking nut case.

> Ignoring your language...
> Google does not have the answer to everything.
> Try asking google how you overcome the problem of recording audio in a
> room
> that has air conditioner noise.

** ROTFLMAO !!!

We have ourselves a real live one here - folks.

Baaaaaahhhhhhhhhhh....................



... Phil

[Brian]

So you Do have something against Kiwis.
Diid a Kiwi say something that upset you?

PS you are encouraging me to reply to you.

--
Regards Brian

[Ty Ford]

On Mon, 1 Oct 2012 07:51:44 -0400, Brian wrote
(in article <1770675877370784980....@free.teranews.com>):

> Ignoring your language... Google does not have the answer to everything. Try
> asking google how you overcome the problem of recording audio in a room that
> has air conditioner noise.
>
>

Turn off the HVAC or find another room.

Regards,

Ty Ford

Try my new blog; http://tyfordaudiovideo.blogspot.com/
Try my audio sample archive: http://tinyurl.com/796z25d
Try my gear reviews: http://tinyurl.com/79q797r

[Flint]

Ok 'Ped-phil', get back on yer meds. Now, you can go off and hide in
the weeds/tall grass.

--
MFB

[Brian]

What does HVAC mean?

--
Regards Brian

[Flint]

http://en.wikipedia.org/wiki/HVAC :

HVAC = heating, ventilation, and air conditioning

--
MFB

[Brian]

Ty Ford <tyre...@comcast.net> wrote:
> On Mon, 1 Oct 2012 07:51:44 -0400, Brian wrote
> (in article <1770675877370784980....@free.teranews.com>):
>
>> Ignoring your language... Google does not have the answer to everything. Try
>> asking google how you overcome the problem of recording audio in a room that
>> has air conditioner noise.
>>
>>
>
> Turn off the HVAC or find another room.

I was in this situation and the air conditioning was connected to the
hospital so it was not possible to turn it off. All of the rooms in the
building had air conditioning so the noise could be heard.

>
> Regards,
>
> Ty Ford
>
> Try my new blog; http://tyfordaudiovideo.blogspot.com/
> Try my audio sample archive: http://tinyurl.com/796z25d
> Try my gear reviews: http://tinyurl.com/79q797r

Regards Brian

[Ty Ford]

On Wed, 3 Oct 2012 20:37:17 -0400, Brian wrote
(in article <89038741371003598.8...@free.teranews.com>):

If you walk out in traffic, you expect to get hit. If you record in a noisy
environment that you have no control over, you have made an equally bad
decision. If the noise is too objectionable don't record there.

[Brian]

I agree Ty Ford.
But in this case it was not my decision where the location for the
recording as the director had decided to use the location. There wax
plenty of space for lighting and moving the camera around. A setup that
looks like an reception of an office in someones house might have been
better. I feel that if it was a professional production then the actors
would likely be asked to overdub their voices afterwards in a quieter
environment.
The last I heard was that the video editor was successful in removing most
of the air conditioners noise.

--
Regards Brian

[Phil W]

Brian:

> But in this case it was not my decision where the location for the
> recording as the director had decided to use the location. There wax
> plenty of space for lighting and moving the camera around.

Typical way of thinking - the picture side is more important than the audio
side...

> A setup that
> looks like an reception of an office in someones house might have been
> better. I feel that if it was a professional production then the actors
> would likely be asked to overdub their voices afterwards in a quieter
> environment.
> The last I heard was that the video editor was successful in removing most
> of the air conditioners noise.

Well, that´s probably good news. And what´s left of the noise could be
called "atmo", then... ;-)

[Richard Webb]

On Sun 2012-Oct-21 06:56, Brian writes:
> But in this case it was not my decision where the location for the
> recording as the director had decided to use the location. There wax
> plenty of space for lighting and moving the camera around. A setup
> that looks like an reception of an office in someones house might
> have been better. I feel that if it was a professional production
> then the actors would likely be asked to overdub their voices
> afterwards in a quieter environment.

Right, called adr among the pros.

Other techniques that might have been used include a lav on
each person who was expected to speak, a boom operatorwith a tight patterned microphone getting in close, etc.

There's a reason that we tell folks to hire the pros and not amateurs for audio for film and video.

> The last I heard was that the video editor was successful in removing
> most of the air conditioners noise.

YEp, some judicious use of a parametric eq or other tools
might have helped, but had a professional been engaged the
right equipment and techniques might have been used.

Location sound guys deal with this all the time, locations
are chosen for how friendly they are to the camera with no
thought to sound.

Do some looking at the newsgroup
rec.arts.movies.productioun.sound for lots of this sort of
discussion. This is basically the wrong group. We're
primarily concerned with sound reinforcement for live
productions of all types, concerts, dramatic performances,
lectures, worship services, etc.

I would have steered you to that newsgroup earlier in this
thread instead of just throwing off a flippant smart assed
answer, but didn't have enough info in your original post to discern what your problem was. OThers had the same problem, which is why you got a few flip responses. Ty sort of drew
you out and got to the meat of the thing, thanks for that
Ty!


Regards,
Richard
--
| Remove .my.foot for email
| via Waldo's Place USA Fidonet<->Internet Gateway Site
| Standard disclaimer: The views of this user are strictly his own.

[Steve M]

"Brian" asked Allison the Asshole:

> Have you got something against Kiwis?
>

Allison has something "against" everyone. He's a borderline sociopath.
I think he probably even hates himself to a great degree. Judging by his
behavior on this NG, I can see why.

--
Steve McQ

[oldp...@spamsucks.net]

Well said sir!

IT all started when his favorite sheep died and he started
singing that song
"there will never be another ewe."
<grd>

[Brian]

Richard Webb <Richard.We...@116-901.ftn.wpusa.dynip.com> wrote:
>
>
> Do some looking at the newsgroup
> rec.arts.movies.productioun.sound for lots of this sort of
> discussion. This is basically the wrong group. We're
> primarily concerned with sound reinforcement for live
> productions of all types, concerts, dramatic performances,
> lectures, worship services, etc.
>
> I would have steered you to that newsgroup earlier in this
> thread instead of just throwing off a flippant smart assed
> answer, but didn't have enough info in your original post to discern
> what your problem was. OThers had the same problem, which is why you got
> a few flip responses. Ty sort of drew
> you out and got to the meat of the thing, thanks for that
> Ty!
>

Thanks Richard for defining what the purpose of this newsgroup is for.
I'll try rec.arts.movies.productioun.sound as you suggested.


--
Regards Brian

[Richard Webb]

Brian writes:

>> Do some looking at the newsgroup
>> rec.arts.movies.productioun.sound for lots of this sort of
>> discussion. This is basically the wrong group. We're
>> primarily concerned with sound reinforcement for live
>> productions of all types, concerts, dramatic performances,
>> lectures, worship services, etc.

<snip>

> Thanks Richard for defining what the purpose of this newsgroup is
> for. I'll try rec.arts.movies.productioun.sound as you suggested.

We forget oftentimes that since there isn't a regular
posting explaining it folks might not know, hence we get the odd home hi fi or other question, which usually garners some rather flip answers from some of us old boys. I was guilty
of that in your case at first.

As Ty said, it's always preferable to not record in such an
environment in the first place, but the film sound guys
often have to work in far less than ideal. YEs, you need
more gear, a good boom mic, usually with a good boom
operator to keep the boom out of the shot, a mixer, lavs for each person that may be speaking, any or all of the above
techniques in those situations.
When you have a look there via google you'll find lots of
tales from the trenches similar to yours, and the solutions
those guys employed. Always better to fix it at the source
than to fix it in post.


Regards,
Richard
... Remote audio in the southland: See www.gatasound.com

[Ty Ford]

On Sun, 21 Oct 2012 17:27:35 -0400, Richard Webb wrote
(in article <5c0_2012...@ftn.wpusa.dynip.com>):

> Ty sort of drew you out and got to the meat of the thing, thanks for that Ty!

Even a broken clock is right twice a day, Richard :)

[Peter Larsen]

geoff wrote:

> "Brian" <bcl...@es.co.nz> wrote in message
> news:323986194370313358.3...@free.teranews.com...

>> What type of microphone records at very low frequency.
>> Often when playing movies there are very low frequency sounds heard
>> on a sub woofer but the frequency seems to be very low for a
>> microphone to capture.

> Pretty much any condensor mic.

Yes, but a very interesting one is the Sennheiser MKH 106 in measurement
version, it goes down to 1 or specially versioned 0.1 Hz. For high spl use
the small membrane DPA's shine, they have been used for recording the launch
of a space shuttle at "fairly close range".

> geoff

Kind regards

Peter Larsen

[Arny Krueger]

"Brian" <bcl...@es.co.nz> wrote in message
news:323986194370313358.3...@free.teranews.com...
> What type of microphone records at very low frequency.
> Often when playing movies there are very low frequency sounds heard on a
> sub woofer but the frequency seems to be very low for a microphone to
> capture.

Some of those sounds are no doubt synthesized.

The low frequency response of a microphone is limited in a number of ways:

(1) Acoustically by any venting of the area behind the diaphragm. Single
diaphragm cardioid, ribbon and hypercardiod microphones are open on their
back side by design.
(2) Electronically by any transformers, buffers, line drivers or other
electronic circuits that are part of the micrphone.
(3) Any electronic high pass filters that may be intentially added to the
microphone. Sometimes capacitive voltage dividers are used to reduce the
sensitivity of the microphone, and these inherently block DC (an example of
extreme LF).

Measurement microphones with exceptionally good LF response have special
vents with long acoustic time constants. The area behind the diaphragm has
to be vented to deal with changes in altitude and barometric pressure.

[Juha Silvennoinen]

On Wednesday, September 26, 2012 at 2:52:38 AM UTC+2, Brian wrote:
> What type of microphone records at very low frequency.
> Often when playing movies there are very low frequency sounds heard on a
> sub woofer but the frequency seems to be very low for a microphone to
> capture.
>

> --
> Regards Brian

Hi Brian

I am not an expert but
- The microphone should have good frequency response in low frequencies. If the noise is only 30 db and the response is -25 db then the recording will show only 5 db. I am looking at SMALL DIAPHRAGM MICROPHONES.
look at https://www.neumann.com/en-en/homestudio-academy/
- Your app should record low frequencies. I have tried many apps and only Doldy app so far seems to record low frequencies in my smartphone. I dont know if it depnds on its codec which codes the analog to digital and stores to memory
- when playing the recorded sound I have noticed that my smart phone shows no sound in low frequencies. Its frequency response in low frequencies is -25 db. I have measured that the noise is at least 45 db but i hear only whisper which is about 20 db. So real sound 45 db minus response's affect -25 db gives 20 db which is whisper
- so I have to send the recorded sound to my pc. it has very good frequensy response. actually it emphasizes a bit the base sounds. Now i hear this disrurbing low prequeency soundound from Dolby recordings. I will check the other apps also in the same way

Try this

yours juha

[Chris K-Man (Zickcermacity)]

_________________

How about a kick drum mic?