|
NASA scientists have begun to computerize human,
silent reading using nerve signals in the throat that
control speech. In preliminary experiments, NASA
scientists found that small, button-sized sensors, stuck
under the chin and on either side of the ‘Adam’s apple,’
could gather nerve signals, send them to a processor and
then to a computer program that translates them into
words.
"What is analyzed is silent, or sub-auditory, speech,
such as when a person silently reads or talks to
himself," said Chuck Jorgensen (pictured), a scientist
whose team is developing silent, subvocal speech
recognition at NASA Ames Research Center in California’s
Silicon Valley.
Please credit photo to NASA Ames Research Center,
Dominic Hart.
Photo No. ACD04-0024-001
Preview
Size| Publication
Size |
|
NASA scientists have begun to computerize human,
silent reading using nerve signals in the throat that
control speech. In preliminary experiments, NASA
scientists found that small, button-sized sensors, stuck
under the chin and on either side of the ‘Adam’s apple,’
could gather nerve signals, send them to a processor and
then to a computer program that translates them into
words.
"What is analyzed is silent, or sub-auditory, speech,
such as when a person silently reads or talks to
himself," said Chuck Jorgensen (pictured), a scientist
whose team is developing silent, subvocal speech
recognition at NASA Ames Research Center in California’s
Silicon Valley.
Please credit photo to NASA Ames Research Center,
Dominic Hart.
Photo No. ACD04-0024-002
Preview
Size| Publication
Size |
|
To learn more about what is in the patterns of the
nerve signals that control vocal chords, muscles and
tongue position, NASA Ames scientists are studying the
complex nerve signal patterns. "We use an amplifier to
strengthen the electrical nerve signals. These are
processed to remove noise, and then we process them to
see useful parts of the signals to show one word from
another," Jorgensen said.
After the signals are amplified, computer software
‘reads’ the signals to recognize each word and sound.
"We use neural network software to learn and classify
the words," Jorgensen said. "It’s recognizing the
pattern of a word in the signal."
Please credit photo to NASA Ames Research Center,
Dominic Hart.
Photo No. ACD04-0024-003
Preview
Size| Publication
Size |
|
In their first experiment, scientists ‘trained’
special software to recognize six words and 10 digits
that the researchers ‘repeated’ subvocally. Initial word
recognition results were an average of 92 percent
accurate. The first sub-vocal words the system ‘learned’
were ‘stop,’ ‘go,’ ‘left,’ ‘right,’ ‘alpha’ and ‘omega’
and the digits ‘zero’ through ‘nine.’ Silently speaking
these words, scientists conducted simple searches on the
Internet by using a number chart that represents the
alphabet to control a Web browser program. Please credit
photo to NASA Ames Research Center, Dominic Hart.
"We took the alphabet and put it into a matrix --
like a calendar. We numbered the columns and rows, and
we could identify each letter with a pair of
single-digit numbers," Jorgensen said. "So we silently
spelled out ‘NASA’ and then submitted it to a well-known
Web search engine. We electronically numbered the Web
pages that came up as search results. We used the
numbers again to choose Web pages to examine. This
proves we could browse the Web without touching a
keyboard," Jorgensen explained.
Please credit photo to NASA Ames Research Center,
Dominic Hart.
Photo No. ACD04-0024-004
Preview
Size| Publication
Size
|
|
A second demonstration will be to control a
mechanical device using a simple set of commands,
according to Jorgensen. His team is planning tests with
a simulated Mars rover. "We can have the model rover go
left or right using silently ‘spoken’ words," Jorgensen
said.
Please credit photo to NASA Ames Research Center,
Dominic Hart.
Photo No. ACD04-0024-005
Preview
Size| Publication
Size
|
|
A second demonstration will be to control a
mechanical device using a simple set of commands,
according to Jorgensen. His team is planning tests with
a simulated Mars rover. "We can have the model rover go
left or right using silently ‘spoken’ words," Jorgensen
said.
Please credit photo to NASA Ames Research Center,
Dominic Hart.
Photo No. ACD04-0024-006
Preview
Size| Publication
Size |
|
People in noisy conditions could use the system when
privacy is needed, such as during telephone
conversations on buses or trains, according to
scientists.
Please credit photo to NASA Ames Research Center,
Dominic Hart.
Photo No. ACD04-0024-007
Preview
Size| Publication
Size | RELATED
LINKS +
NASA Develops System to Computerize Silent, 'Subvocal
Speech'
text-only
version of this release
To receive
Ames news releases via e-mail, send an e-mail with the word
"subscribe" in the subject line to mailto:ames-releases-request@lists.arc.nasa.gov
To unsubscribe, send an e-mail to the same address with
"unsubscribe" in the subject line.
NASA
Image Policies
|