Curious Human voice

[Audiobuff88]

Hi there,

Humor me as something recently came to mind. If a person talks extremely quietly without even opening their mouth and no one else can hear it. Would that be considered infra-sound?

 

[JMFahey]

No.

Infra sound means frequencies below the threshold of audibility, usually below 20 Hz.

Not sure how could a Human generate that.

 

[Audiobuff88]

What Hz would you consider that to be?

 

[JMFahey]

Voice frequency - Wikipedia

The voiced speech of a typical adult male will have a fundamental frequency from 85 to 180 Hz, and that of a typical adult female from 165 to 255 Hz

So nowhere near 20Hz and even less below that.

A human speaking very very quietly will still produce frequencies within that range and not (way) below it.

Even worse: whispered voice seems to have a much reduced Bass content than same spoken at normal level.

Not surprised you found nothing (I mean speech information) when exploring the very low frequency band

 

[Hiten]

Tim Storms

YouTube

Regards

 

[Audiobuff88]

Thankyou for the information and wow...does that guy have an low voice....I'm guessing that ultrasonic mics, won't pick up human voices then?

 

[Galu]

Would that be considered infra-sound?

It's not humans you should be considering, it's elephants!

Mystery of elephant infrasounds revealed -- ScienceDaily

 

[Galu]

I'm guessing that ultrasonic mics, won't pick up human voices then?

Bats, rats, mice and squirrels vocalise in the 20kHz to 60kHz region.

Wildlife Sound Recording Society - recording ultrasonic

 

[Pano]

Are you still trying to record the neighbors? Or vice-versa?

 

[Galu]

Does Audiobuff actually live in a zoo?

 

[Hearinspace]

. . . . . If a person talks extremely quietly without even opening their mouth and no one else can hear it. . . . . . .

It brings to mind the term subvocalization, used as an important part of plots in sci-fi novels by David Brin and William Gibson . Read them a long time ago but I think they used microphones implanted in the jaw or molars.
Google searches bring up a lot of interesting stuff, including a NASA page on it.

 

[Cal Weldon]

If a person talks extremely quietly without even opening their mouth

You're going to have to explain how that is possible.

 

[Hearinspace]

Oh c'mon Cal, you never whispered "OK, I'll be back for it later." into the salesman's ear while your wife was standing there thinking "Who the hell would pay so much for something like that?" ?

 

[Cal Weldon]

I might be wrong but I was sure my mouth had to be open at least a little for that to happen.

I'll be right back...

 

[Audiobuff88]

Ehh living in an Zoo would be about the same to be honest and speaking of an Zoo...do you think an Bat detector would work?

As for the jaw installment...that simply sounds painful.