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Assignment 2 – Mics and Fruit

September 9, 2009

First, here are my notes on each of the mics when listening to pink sound through them.

Cardioid

Louder in the front with more high frequencies

The side has a very hollow tone and the back sounds very distant

Front about twice as loud as back. Side is in between them both.

Hyper-cardioid

Similar to the cardiod tone-wise but has a few more mids in the front and back (I think, but very little difference).

The hyper has a louder back than side.

Omni

Very similar tone and loudness all round.

Dumbbell

Very quiet sides compared to the front and back

The most obvious null region out of all the mics

The tone of the back and front are very similar.

Difference between real environment and mic’ed environment

The most obvious difference when putting on the microphone was how loud the background sounds were. I am actually still trying to work out exactly why this is, since presumably the sound coming out of the headphones is very similar to that of the environment. I would guess it is because the microphone diaphragm is more sensitive than the eardrum, and picks up quieter sounds then amplifies them to a level, which the eardrum can pick up? Comments welcome on this topic…

Apart from that, it is also harder to isolate certain sounds but this is almost certainly our perceptional skill at isolating directions and honing in on frequencies we want to pay attention to.

And finally, new sounds uploaded to free sounds

First, a familiar sound, Luke and I re-recorded the sound of a bike wheel being slowed down by placing a sandal in the spokes in a much quieter environment. Anyway, the description is the same as last time and up on the site.

Link: http://www.freesound.org/samplesViewSingle.php?id=79209

The new sounds we recorded were sounds of fruit being eaten in the studio. We recorded Luke peeling and eating an orange, a banana and an apple. Luke posted some of the apple sounds, and I did posted the clips of the banana and the orange.

Link: http://www.freesound.org/samplesViewSingle.php?id=79209

Enjoy,

-Peter

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2 Comments leave one →
  1. September 12, 2009 2:18 pm

    The bike wheel is great. The actions of eating a banana and an orange are not the most sonically interesting actions, they do not have much identity.

    …xavier

  2. jaykadis permalink*
    September 14, 2009 7:42 am

    Possibly the sensitivity of the microphones does contribute to the flattening of the sound field perceptually, but I think the major factor is the reduction of subtle cues about the direction from which sounds originate. That changes the brain’s ability to separate foreground and background sounds based on their differing points of origin. Without compressing the dynamic range I don’t think the alteration of relative sound levels contributes as much to this effect.

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