Recording sound with cell phone? Wind noise?
Thread Starter
|
Road Master
Joined: Mar 2018
Posts: 804
Likes: 92
From: Texas
Recording sound with cell phone? Wind noise?
I am trying to record the sound of my pipes while riding my bike. I only have a cell phone. I strapped it to the passenger pillion. The problem I am having is, once I get up to speed, the wind noise is much to loud. Can anyone give me some tips on how to record the sound of my pipes, using only a cell phone, and not have any wind noise?
Ultimate HDF Member
Joined: Oct 2011
Posts: 5,691
Likes: 1,651
From: Olean, NY
Put your phone in a sock, it will absorb the sound of the wind. If theres red bands around the top, thats even better as the red color adds a little more clarity over the blue stripes.
Stellar HDF Member
Joined: Apr 2017
Posts: 3,268
Likes: 3,085
From: Westchester, NY
The trick with the sock is to put it in the right side exhaust. You'll get the most accurate recorded tone, and the sock insulates it from harsh vibrations.
Thread Starter
|
Road Master
Joined: Mar 2018
Posts: 804
Likes: 92
From: Texas
Some members like to get on my case for asking a question and then answering it myself. Well, this thread is a good example of why I do that.
Here is a youtube video that I found that gives a possible solution...
Here is a youtube video that I found that gives a possible solution...
Grand HDF Member
Joined: Jan 2010
Posts: 3,514
Likes: 1,992
From: Vancouver BC
Due to the nature of voice transmission being in a narrow portion of the entire audio band, cell phone mic’s have a frequency cutoff at below 300 Hz. This is so you don’t waste unnecessary bandwidth transmitting sound that is outside of the ‘intelligible’ portion of the audio spectrum. This means a lot of the low end rumble and throaty sounds of your pipes won’t be recorded properly. A $30 digital pocket recorder will perform much much better than a cellphone, just suspend it with the mic facing backwards away from the wind near your pipes. A small mesh bag filled with dryer lint or dog hair placed over the recorder’s mic will break up any residual wind noise.
Thread Starter
|
Road Master
Joined: Mar 2018
Posts: 804
Likes: 92
From: Texas
Due to the nature of voice transmission being in a narrow portion of the entire audio band, cell phone mic’s have a frequency cutoff at below 300 Hz. This is so you don’t waste unnecessary bandwidth transmitting sound that is outside of the ‘intelligible’ portion of the audio spectrum. This means a lot of the low end rumble and throaty sounds of your pipes won’t be recorded properly. A $30 digital pocket recorder will perform much much better than a cellphone, just suspend it with the mic facing backwards away from the wind near your pipes. A small mesh bag filled with dryer lint or dog hair placed over the recorder’s mic will break up any residual wind noise.
Full Spectrogram, not zoomed.
Zoomed spectrogram. Cutoff frequency when RECORDING appears to be below 50Hz. You can see the "ringing" caused by the wind when the bike is moving.
These spectrograms are from the recording I posted to the classified ads forum yesterday.
YOU DO HAVE TO LISTEN TO THE AUDIO ON A SET OF GOOD SPEAKERS, like on your computer. When you LISTEN on your cell phone you do lose all the low frequencies. But the low frequencies are recorded, you just have to playback on a set of good speakers.
https://www.hdforums.com/forum/motor...l#post18104738
Last edited by BobRR; Mar 15, 2019 at 08:32 AM.
Thread
Thread Starter
Forum
Replies
Last Post
