Claims:We claim:

1. A noise cancelling device, said device comprises:
(i) a noise frequency reading device for sensing the frequency of surrounding noise;
(ii) a carrier signal device to send a carrier signal in form of a carrier wave;
(iii) a frequency signal keying device for converting frequency of a carrier wave to digital signal;
(iv) a frequency modulation device for converting higher frequency to lower frequency;
(v) a noise cancellation device chipset for deleting extra frequency for clear audibility of the converted lower frequency;
(vi) a power source;
wherein the device senses a high frequency sound in a surrounding area and sends a carrier wave for modulation to a lower frequency, when the higher frequency is above a threshold level.

2. The noise cancelling device as claimed in claim 1, wherein a clipper is used to identify the high frequency sound and therefore notifies the frequency modulation device to operate.

3. The noise cancelling device as claimed in claim 1, wherein the high frequency sound is above 40db.

4. The noise cancelling device as claimed in claim 1, wherein the device can modulate frequency upto 115db.

5. The noise cancelling device as claimed in claim 1, wherein the device is configured to be attached within a waterproof casing on an electric pole.

6. The noise cancelling device as claimed in claim 1, wherein the power source is electric power or solar power.
, Description:Field of Invention:
Present invention relates to a device for cancelling noise in surrounding area. More particularly, the invention relates to a device for cancelling noise which can be placed outdoors.

Background of the invention:
There are various noise cancelling devices, but mostly works for small enclosed areas and within a close range of 40 CMS and this for 400 Hertz sound.
Portable Low-Frequency Noise Reduction Device for Both Small Open and Closed Spaces by Chao Wang, Haiyang Gao, Liyao Yu, TiantianYu,WenhuiYan,and QiumengXue, Shock and Vibration, Volume 2016, Article ID 6241935, 11 pages discloses portable low-frequency noise reduction device we developed in this research can provide an effective way for solving low-frequency noise pollution problem in the small space. This work describes the design principle and the prototype structures for two versions of V1.5 and V2.0 and builds the noise test systems for small spaces, respectively. These devices, installed on the outer surface of the small spaces, can automatically identify the noise spectrum and implement noise reduction by means of the active noise control (ANC) technology. The testing results indicate that the noise can be reduced 12?dB in the range of 250?Hz~400?Hz for the small closed space while, for the small open space, the best effect of 5.88?dB occurs in the optimal frequency of 450?Hz. These effects will be weakened with the increasing distance away from the source and show the obvious axisymmetric distribution in the inverted cone space.First one is for small area that is open or closed small area of having distance of 40 centimeter that allow to reduce the sound of 400 Hertz.

Frequency-Lowering Devices for Managing High-Frequency Hearing Loss, by Andrea Simpson, is for purpose of providing high-frequency information to those with severe high-frequency hearing loss—addresses a clinical need most conventional hearing devices are still unable to provide.However, this a hypothetical system, which defines that this hypothetical system is the combination of the processing parameters that having some complexity with desired frequency parameters.
Thus, there arises a need to develop a noise cancelling device which covers large area and is less harmful due to its less vibrational frequency.This system can be installed on poles and outdoors which will help to reduce noise frequency for a large area.

Summary of the Invention:

In this disclosure, whenever a composition, an element or a group of elements is preceded with the transitional phrase "comprising", it is understood that we also contemplate the same composition, element or group of elements with transitional phrases "consisting essentially of, "consisting", "selected from the group of consisting of, "including", or "is" preceding the recitation of the composition, element or group of elements and vice versa.

According to an aspect of the invention, there is a noise cancelling device, said device comprises a noise frequency reading device for sensing the frequency of surrounding noise;a carrier signal device to send a carrier signal in form of a carrier wave;a frequency signal keying device for converting frequency of a carrier wave to digital signal;a frequency modulation device for converting higher frequency to lower frequency;a noise cancellation device chipset for deleting extra frequency for clear audibility of the converted lower frequency;a power source;wherein the device senses a high frequency sound in a surrounding area and sends a carrier wave for modulation to a lower frequency, when the higher frequency is above a threshold level.

Yet according to another embodiment of the invention, a clipper is used to identify the high frequency sound and therefore notifies the frequency modulation device to operate.

Yet according to another embodiment of the invention, the high frequency sound is above 40db.

Yet according to another embodiment of the invention, the device can modulate frequency upto 115db.

Yet according to another embodiment of the invention, the device is configured to be attached within a waterproof casing on an electric pole.

Yet according to another embodiment of the invention, the power source is electric power or solar power.

Brief description of drawings:
So that the manner in which the above recited features of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only typical embodiments of this invention and are therefore not to be considered limiting of its scope, for the invention may admit to other equally effective embodiments.
Figure 1 is a diagram showing components of the system and the manner of communication between the components.

Detailed description of Invention:
The device of this invention is capable of detecting high frequency (loud) sound by high frequency reader (or loudness reader, thereby informing aclipper that activates the device.
The functioning of the device is based on the concept of converting a high frequency sound into a low frequency sound, by sensing a sound reaching to a threshold frequency.

Table 1 shows permissible range and exposure time for frequency

So according to above table 40 dB is the normal sound that can annoy people if they are in contact with it form a normal time period.
So, for the above two tables it can be easily understood that at 40 dB the sound is annoying and at the range of 40 dB to 70 dB if sound can be heard for a continuous time period, then it may cause some hearing damage or permanent hearing loss. So, for this noise cancellation device the clipper is set to 40 dB which is will a threshold frequency for the activation of noise cancellation device circuit.
Figure 1 is a line diagram for showing
The noise cancelling device comprises of a noise frequency reading device 10 reads the frequency of sound in surrounding area. A carrier signal device 12 is present to send a carrier signal in form of a carrier wave. This carrier signal device 12 sends carrier wave to a frequency signal keying device13 for converting frequency of a carrier wave to digital signal. A frequency modulation device 15 converts higher frequency to lower frequency. A noise cancellation chipset 14 is placed between frequency modulation device 15 and frequency signal keying device 13, for deleting extra frequency for clear audibility of the converted lower frequency. The device works on gaining power from a power source. The device 100 senses a high frequency sound in a surrounding area and sends a carrier wave for modulation to a lower frequency, when the higher frequency is above a threshold level.
The device 100 also comprises of a clipper 11 to identify the high frequency sound and therefore notifies the frequency modulation device 15 to operate.

The device 100 can work on a frequency as low as 40db. The device 100 can modulate frequency upto 115db.
The device is configured to be attached within a waterproof casing on an electric pole.
According to an embodiment of the invention, the power source is electric power or solar power.

Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
While the embodiments of the present invention have been disclosed above, but its use is not limited to the description set forth and described embodiments, which can be applied to various fields suitable for the present invention, for the person skilled in the art, can be easily realized a further modification, thus without departing from the generic concept claims and equivalents as defined by the scope of the present invention is not limited to the specific details shown and described herein with legend.