DISPOSITIF DOMESTIQUE DOTE DE CAPACITES ANTIBRUIT. CE DISPOSITIF SERVIRAIT A DE NOMBREUSES UTILISATIONS ET SERAIT BENEFIQUE AUX MEMBRES DE LA FAMILLE DE NOMBREUSES FACONS

HOME DEVICE FITTED WITH NOISE CANCELLING CAPABILITIES. THIS DEVICE WOULD SERVE MANY PURPOSES AND BE BENEFICIAL TO FAMILY MEMBERS IN MANY WAYS.

Abrégé anglais

Abstract of new invention for household
Active Noise Cancelling speaker system.
Abstract- A new device that will circumvent multiple social problems related
to unwanted noise
aggression.
1- People living in urban areas are often prone to live in vicinity of noisy
environment. City
traffic, outside noise coming from trucks, cars, can certainly degrade people
quality of
life. This device would greatly reduce or totally eliminate these outside
noises.
2- Snoring is widespread and is detrimental to many people. This device
eliminates the
sound of snoring and permits spouses to have a better sleep.
Description ¨This device is fitted with an electronic circuit that actively
cancel sound waves. It
receives the incoming sound and emits an opposite sound, rendering the
incoming sound
inaudible to a listener.
Sound is a pressure wave, which consists of alternating periods of compression
and rarefaction.
A noise-cancellation speaker system emits a sound wave with the same amplitude
but with
inverted phase (also known as antiphase) to the original sound. The waves
combine to form a
new wave, in a process called interference, and effectively cancel each other
out ¨ an effect
which is called destructive interference.
Modern active noise control is generally achieved through the use of digital
circuitry. Adaptive
algorithms are designed to analyze the waveform of the background aural or non-
aural noise,
then based on the specific algorithm generate a signal that will either phase
shift or invert the
polarity of the original signal. This inverted signal (in antiphase) is then
amplified and a
transducer creates a sound wave directly proportional to the amplitude of the
original
waveform, creating destructive interference. This effectively reduces the
volume of the
perceivable noise to a person hearing.
A noise-cancellation speaker may be co-located with the sound source to be
attenuated. In this
case it must have the same audio power level as the source of the unwanted
sound to
effectively cancel. Alternatively, the transducer emitting the cancellation
signal may be located
at the location where sound attenuation is wanted (e.g. the user's ear). This
requires a much
lower power level for cancellation but is effective only for a single user and
only in close
proximity. Noise cancellation at other wider locations is more difficult as
the three-dimensional
wave fronts of the unwanted sound and the cancellation signal could match and
create
alternating zones of constructive and destructive interference, reducing noise
in some spots
while doubling noise in others. In smaller enclosed spaces (e.g. a bedroom)
global noise
reduction can be achieved via multiple speakers and feedback microphones, and
measurement
of the modal responses of the enclosure.
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Description

Problem solving ¨
One area that is problematic is the living spaces that could be located in a
noisy environment,
where low frequency noises are present. In order to improve the quality of
living in such
environment, a properly sized active noise cancelling speaker system would
eliminate the
unwanted noises but retain high frequency sounds as fire alarms, alarm clock,
baby
communicator, door bells, telephone, all these sounds that are necessary for
the safety of the
whole family.
Another problem to solve is the quality of sleep for spouses that must endure
snoring sounds
every day, and suffer from sleep deprivation, tiredness, irritability that
leads to certain but not
limited to social and interpersonal issues.
A 2001 study at the Chicago Medical Institute suggested that sleep deprivation
may be linked to
serious diseases, such as heart disease and mental illness including psychosis
and bipolar
disorder. The link between sleep deprivation and psychosis was further
documented in 2007
through a study at Harvard Medical School and the University of California at
Berkeley. The
study revealed, using MRI scans, that sleep deprivation causes the brain to
become incapable of
putting an emotional event into the proper perspective and incapable of making
a controlled,
suitable response to the event.
The negative effects of sleep deprivation on alertness and cognitive
performance suggest
decreases in brain activity and function, primarily in the thalamus, a
structure involved in
alertness and attention, and in the prefrontal cortex, a region sub-serving
alertness, attention,
and higher-order cognitive processes, rendering affected people prone to
accident.
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Effects of
Sleep deprivation
- _________________________ Irritability
- Cognitive impairment
1
- Memory lapses or loss - Increased heart rate variability
- Impaired moral - Risk of heart disease
judgement
- Severe yawning
_________________________________________________ - Increased
- Hallucinations
reaction time
- Symptoms similar 1 -
- Decreased accuracy
to ADHD ,
. - Tremors -
- Impaired immune 4'
Aches
system
, Other
,
yµ - Growth suppression
- Risk of diabetes ________________________________ - Risk of obesity
Type 2 - Decreased
temperature
By Mikael Haggstrom.When using this image in external works, it may be cited
as:Flaggstrom, Mikael
(2014). "Medical gallery of Mikael FlaggstrOm 2014". WikiJournal of Medicine 1
(2).
D01:10.15347/wjm/2014.008. ISSN 2002-4436. Public Domain.orBy Mikael
Flaggstrom, used with
permission. - All used images are in public domain., CCO,
https://commons.wikimedia.org/w/index.php?curid=6892366
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