Patent Publication Number: US-2020278324-A1

Title: Method for evaluating noise of glass run

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     This application claims the benefit under 35 USC § 119 of JP Patent Application JP 2019-036393 filed Feb. 28, 2019, the entire disclosure of which is incorporated herein by reference. 
     BACKGROUND INFORMATION 
     The present invention relates to a method for evaluating noise of a glass run of an automobile door, for guiding a door glass in a frame. 
     The glass run of the automobile door couples to the frame, for guiding the door glass in the frame. The frame includes a door sash and a door frame. 
     The glass run makes noise when the automobile moves on bumpy roads or when the door is closed with the automobile stopped. 
     The noise is called “glass-run noise”. 
     Since members other than the glass run as well as the glass run make the noise, the noise made by the glass run is difficult to separate. 
     Examples of the noise of the members other than the glass run include squeak of the parts for the automobile door (interior trim, resin cover, and the like), road noise of tires, engine noise, and wind noise. 
     In this connection, Japanese Patent No. 6225368 discloses a method for detecting noise of a steering system of the automobile and an apparatus for evaluating the noise. But Japanese Patent No. 6225368 is not effective in evaluating the noise of the glass run. 
     Therefore, an object of the present invention is to provide the method for evaluating the noise of the glass run, which is capable of reproducing oscillation on a real automobile. 
     SUMMARY 
     In order to achieve the above-mentioned object, according to one aspect of the invention, a method for evaluating noise of a glass run ( 10 ) of an automobile door ( 1 ) is provided. The glass run ( 10 ) guides a door glass ( 2 ) in a frame ( 100 ). The glass run ( 10 ) forms a channel ( 19 ). 
     The method includes: 
     detecting oscillation of the door glass ( 2 ) by a sensor ( 20 ) for the door glass and then storing the oscillation as an oscillatory wave form ( 300 ) of the door glass and detecting oscillation of the frame ( 100 ) by a sensor ( 30 ) for the frame and then storing the oscillation as an oscillatory wave form ( 400 ) of the frame, with the glass run ( 10 ) coupling to the automobile door; 
     synthesizing the oscillatory wave form ( 300 ) of the door glass and the oscillatory wave form ( 400 ) of the frame, picking out relative oscillation of the door glass ( 2 ) in relation to the frame ( 100 ) and storing the relative oscillation as a synthesized oscillatory wave form ( 500 ); 
     making oscillation by an oscillator ( 40 ) and oscillating the door glass ( 2 ) with the automobile stopped, the oscillation corresponding to the synthesized oscillatory wave form ( 500 ), the oscillator ( 40 ) being on an exterior of the automobile; and 
     detecting sound of the oscillation by a microphone ( 50 ), the oscillation being made by the oscillator ( 40 ), the oscillation corresponding to the synthesized oscillatory wave form ( 500 ), the microphone ( 50 ) being on an interior of the automobile. 
     In addition, according to one aspect of the invention, a method for evaluating noise of a glass run ( 10 ) of an automobile door ( 1 ) is provided. The glass run ( 10 ) guides a door glass ( 2 ) in a frame ( 100 ). The glass run ( 10 ) forms a channel ( 19 ). 
     The method includes: 
     detecting oscillation of the door glass ( 2 ) by a sensor ( 20 ) for the door glass and then storing the oscillation as an oscillatory wave form ( 300 ) of the door glass and detecting oscillation of the frame ( 100 ) by a sensor ( 30 ) for the frame and then storing the oscillation as an oscillatory wave form ( 400 ) of the frame, with the glass run ( 10 ) coupling to the automobile door; 
     synthesizing the oscillatory wave form ( 300 ) of the door glass and the oscillatory wave form ( 400 ) of the frame, picking out relative oscillation of the door glass ( 2 ) in relation to the frame ( 100 ) and storing the relative oscillation as a synthesized oscillatory wave form ( 500 ); 
     coupling the glass run ( 10 ) to a mock frame ( 101 ) on an experimental bench ( 200 ), guiding a mock door glass ( 102 ) in the mock frame ( 101 ), making oscillation by an oscillator ( 40 ) and oscillating the mock door glass ( 102 ), the mock frame ( 101 ) corresponding to the frame ( 100 ), the mock door glass ( 102 ) corresponding to the door glass ( 2 ), the oscillation corresponding to the synthesized oscillatory wave form ( 500 ), the oscillator ( 40 ) being on a surface of the mock door glass ( 102 ); and 
     detecting sound of the oscillation by a microphone ( 50 ), the oscillation being made by the oscillator ( 40 ), the oscillation corresponding to the synthesized oscillatory wave form ( 500 ), the microphone ( 50 ) being on a rear surface of the mock door glass ( 102 ). 
     In addition, according to an aspect of the present invention, the sensor ( 20 ) for the door glass and the sensor ( 30 ) for the frame detect oscillation. The oscillation is made while the automobile is moving. 
     In addition, according to an aspect of the present invention, the sensor ( 20 ) for the door glass and the sensor ( 30 ) for the frame detect oscillation. The oscillation is made when the automobile door ( 1 ) is moved to a closed position from an opened position with the automobile stopped. 
     In addition, according to an aspect of the present invention, the door glass ( 2 ) is at a distance from the closed position and at a distance from a fully-opened position when the sensor ( 20 ) for the door glass and the sensor ( 30 ) for the frame detect the oscillation. 
     In addition, according to an aspect of the present invention, the method further includes visualizing the sound detected by the microphone ( 50 ). 
     In addition, according to an aspect of the present invention, the method further includes amending the wave forms after oscillating the door glass ( 2 ). Amending the wave forms includes: making oscillation which corresponds to the synthesized oscillatory wave form ( 500 ) by the oscillator ( 40 ), detecting the oscillation of the door glass ( 2 ) by the sensor ( 20 ) for door glass and detecting the oscillation of the frame ( 100 ) by the sensor ( 30 ) for the frame, picking out a synthesized oscillatory wave form, as a real synthesized oscillatory wave form ( 800 ), to oscillate the door glass ( 2 ) artificially, comparing the synthesized oscillatory wave form ( 500 ) with the real synthesized oscillatory wave form ( 800 ), and amending the real synthesized oscillatory wave form ( 800 ) by altering an output from the oscillator ( 40 ) such that difference between the synthesized oscillatory wave form ( 500   0  ) and the real synthesized oscillatory wave form ( 800 ) is not more than a fixed value ( 700 ); and 
     substituting the real synthesized oscillatory wave form ( 800 ), which is amended in amending the wave forms, for the synthesized oscillatory wave form ( 500 ), which is in detecting sound. 
     In addition, according to an aspect of the present invention, the method further includes amending the wave forms after oscillating the mock door glass ( 102 ). Amending the wave forms includes: making oscillation which corresponds to the synthesized oscillatory wave form ( 500 ) by the oscillator ( 40 ), detecting the oscillation of the mock door glass ( 102 ) by the sensor ( 20 ) for door glass and detecting the oscillation of the mock frame ( 101 ) by the sensor ( 30 ) for the frame, picking out a synthesized oscillatory wave form, as a real synthesized oscillatory wave form ( 800 ), to oscillate the mock door glass ( 102 ) artificially, comparing the synthesized oscillatory wave form ( 500 ) with the real synthesized oscillatory wave form ( 800 ), and amending the real synthesized oscillatory wave form ( 800 ) by altering an output from the oscillator ( 40 ) such that difference between the synthesized oscillatory wave form ( 500   0  ) and the real synthesized oscillatory wave form ( 800 ) is not more than a fixed value ( 700 ); and 
     substituting the real synthesized oscillatory wave form ( 800 ), which is amended in amending the wave forms, for the synthesized oscillatory wave form ( 500 ), which is in detecting sound. 
     Symbols in parentheses show constituents or items corresponding to the drawings. 
     According to the present invention, the method for evaluating the noise of the glass run of the automobile door includes: detecting the oscillatory wave form of the door glass by the sensor for the door glass, and detecting the oscillatory wave form of the frame by the sensor for the frame, with the glass run coupling to the automobile door; synthesizing the oscillatory wave form of the door glass and the oscillatory wave form of the frame, and picking out the relative oscillation of the door glass as the synthesized oscillatory wave form in relation to the frame. With this configuration, the sound made by the glass run alone is detected. 
     In addition, the method includes: making the oscillation, which corresponds to the synthesized oscillatory wave form, by the oscillator and oscillating the door glass; and detecting the sound by the microphone on the interior of the automobile. With this configuration, the oscillation of the glass run and the sound accompanying the oscillation made on the real automobile is reproduced. 
     Reproduction of the oscillation and the sound enables repeated experiments to modify the glass run in shape and material in consideration of the oscillation of the glass run. 
     In addition, the method includes: coupling the glass run to the mock frame on the experimental bench, guiding the mock door glass in the mock frame, making the oscillation which corresponds to the synthesized oscillatory wave form by the oscillator on the front surface of the mock door glass, oscillating the mock door glass; and detecting the sound of the oscillation which is made by the oscillator and which corresponds to the synthesized oscillatory wave form by the microphone on the rear surface of the mock door glass. With this configuration, the oscillation of the glass run and the sound accompanying the oscillation, which are made on the real automobile, are reproduced on the experimental bench. 
     Accordingly, a small space is sufficient to design the glass run. 
     In addition, the sensor for the door glass and the sensor for the frame detect the oscillation which is made while the automobile is moving. This configuration is effective in designing the glass run capable of controlling oscillation when the automobile moves on bumpy roads or the like. 
     In addition, the sensor for the door glass and the sensor for the frame detect the oscillation which is made when the automobile door is moved to the closed position from the opened position with the automobile stopped. This configuration is effective in designing the glass run capable of controlling oscillation when the door is closed. 
     In addition, the door glass is at the distance from the closed position and at the distance from the fully-opened position, that is the door glass is opened but not to a full width, when the sensor for the door glass and the sensor for the frame detect the oscillation. With this configuration, the oscillation in case the oscillation of the glass run is large and the sound accompanying the large oscillation is reproduced. 
     In addition, the method further includes visualizing the sound of the oscillation detected by the microphone. With this configuration, the sound accompanying the oscillation of the glass run is easily realized. 
     In addition, the method further includes amending the wave forms after oscillating the door glass on the real automobile. In case the difference between the real synthesized oscillatory wave form and the synthesized oscillatory wave form exceeds the fixed value, the real synthesized oscillatory wave form is controlled to approach the synthesized oscillatory wave form by altering the output from the oscillator. The synthesized oscillatory wave form corresponds to the oscillation made by the oscillator. The real synthesized oscillatory wave form corresponds to the artificial oscillation made on the door glass. With this configuration, the oscillation of the glass run and the sound accompanying the oscillation, which are made on the real automobile, are reproduced on an experimental automobile more precisely. 
     Since the oscillator makes the oscillation which corresponds to the synthesized oscillatory wave form and the artificial oscillation made on the door glass which corresponds to the real synthesized oscillatory wave form, the real synthesized oscillatory wave form should be the same as the synthesized oscillatory wave form. But when the oscillator makes the oscillation, a prop to which the oscillator couples, for example, as well as the oscillator oscillates and therefore, the oscillation is attenuated. Also, an environment surrounding the real automobile varies the oscillation. In this connection, amending the wave forms performs a feedback control to amend the difference such that the real synthesized oscillatory wave form is the same as the synthesized oscillatory wave form. 
     In addition, the method further includes amending the wave forms after oscillating the mock door glass on the experimental bench. In case the difference between the real synthesized oscillatory wave form and the synthesized oscillatory wave form exceeds the fixed value, the real synthesized oscillatory wave form is controlled to approach the synthesized oscillatory wave form by altering the output from the oscillator. The synthesized oscillatory wave form corresponds to the oscillation made by the oscillator. The real synthesized oscillatory wave form corresponds to the artificial oscillation made on the mock door glass. With this configuration, the oscillation of the glass run and the sound accompanying the oscillation, which are made on the real automobile, are reproduced on the experimental bench more precisely. 
     Since the oscillator makes the oscillation which corresponds to the synthesized oscillatory wave form and the artificial oscillation made on the mock door glass corresponds to the real synthesized oscillatory wave form, the real synthesized oscillatory wave form should be the same as synthesized oscillatory wave form. But when the oscillator makes the oscillation, the prop to which the oscillator couples, for example, as well as the oscillator oscillates and therefore, the oscillation is attenuated. Also, the environment surrounding the experimental bench varies the oscillation. In this connection, amending the wave forms performs the feedback control to amend the difference such that the real synthesized oscillatory wave form is the same as the synthesized oscillatory wave form. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a side view of an automobile; 
         FIG. 2  is an enlarged cross-sectional view of a glass run taken along line II-II of  FIG. 1  with the glass run coupling to a front door of  FIG. 1 ; 
         FIG. 3  is a side view of a position of a sensor  20  for a door glass and a position of a sensor  30  for a frame in relation to a position of the front door of  FIG. 1 ; 
         FIG. 4  is a partial cross-sectional view of the glass run practicing a method according to an embodiment of the invention of evaluating noise of the glass run; 
         FIG. 5  is a block diagram illustrating electrical components for practicing the method according to the embodiment of the invention of evaluating the noise of the glass run; 
         FIG. 6  is a graph illustrating a relationship between an oscillatory wave form ( 300 ) of the door glass and an oscillatory wave form ( 400 ) of the frame in the method according to the embodiment of the invention of evaluating noise of the glass run, the oscillatory wave form ( 300 ) being detected by the sensor  20 , the oscillatory wave form ( 400 ) being detected by the sensor  30 ; 
         FIG. 7  is a graph illustrating a synthesized oscillatory wave form ( 500 ), which is a relative oscillation of the door glass  2  in relation to the frame  100 , the synthesized oscillatory wave form ( 500 ) being picked out from synthesis of the oscillatory wave form ( 300 ) and the oscillatory wave form ( 400 ) of  FIG. 6 ; 
         FIG. 8  is a view of visualized sound detected by a microphone illustrated in  FIG. 4 ; 
         FIG. 9  is the block diagram illustrating the electrical components for practicing the method according to the embodiment of the invention of evaluating the noise of the glass run with an amendment unit of wave forms added; 
         FIG. 10  is a flowchart illustrating an amendment control of wave forms in the amendment unit of wave forms of  FIG. 9 ; and 
         FIG. 11  is another flowchart illustrating the amendment control of wave forms in the amendment unit of wave forms of  FIG. 9 . 
     
    
    
     DETAILED DESCRIPTION 
     Referring to the Drawings, a method according to an embodiment of the present invention for evaluating noise of a glass run will be described. 
     As illustrated in  FIG. 1  and  FIG. 2 , a glass run  10  of an automobile door  1  (front door  1 A( 1 ), rear door  1 B( 1 )) couples to a frame  100 , for guiding a door glass  2  in the frame  100 . The frame  100  includes a door sash and a door frame. 
     The glass run  10  in general includes a body  18 , an inner lip  14 , an outer lip  15 , an inner-cabin side lip  16 , and an outer-cabin side lip  17 . The body  18  has a substantially U-shaped cross-section including: an inner-cabin side wall  11 ; an outer-cabin side wall  12 ; and a connecting wall  13 , which connects the side walls  11 ,  12  and forms a channel  19 . The inner lip  14  extends toward an exterior of the automobile from an end of the inner-cabin side wall  11  and is slidably brought into contact with an inner-cabin side surface of the door glass  2 . The outer lip  15  extends toward an interior of the automobile from an end of the outer-cabin side wall  12  and is slidably brought into contact with an outer-cabin side surface of the door glass  2 . The inner-cabin side lip  16  extends toward the interior of the automobile from the end of the inner-cabin side wall  11  and holds the frame  100 . The outer-cabin side lip  17  extends toward the exterior of the automobile from the end of the outer-cabin side wall  12  and holds the frame  100 . 
     An evaluation system to practice the method according to the embodiment of the present invention for evaluating the noise of the glass run includes a sensor  20  for the door glass and a sensor  30  for the frame, which are illustrated in  FIG. 3 , an oscillator  40  and a microphone  50 , which are illustrated in  FIG. 4 , and a control system  70 , which is illustrated in  FIG. 5 . The sensor  20  is fixed on the door glass  2  and detects oscillation. The sensor  30  is fixed on the frame  100  and detects oscillation. The oscillator  40  makes the oscillation. The microphone  50  detects sound. The control system  70  controls a system as a whole. 
     The sensor  20  is fixed on an outer-cabin side (or inner-cabin side) of the door glass  2  and detects the oscillation of the door glass  2 . 
     The sensor  30  is fixed on an outer-cabin side of the frame  100  and detects the oscillation of the frame  100 . 
     While in this embodiment, the sensor  20  and the sensor  30  are contact sensors and are fixed on the door glass  2  and the frame  100 , respectively, this should not be construed in a limiting sense. Another possible embodiment is that the sensor  20  and the sensor  30  are contactless sensors capable of sensing displacement of the oscillation and a wave form. 
     The oscillator  40  is fixed on the exterior of the automobile and includes a body  41 , an arm  42 , and a holding part  43 . The arm  42  extends from the body  41 . The holding part  43  is on a top end of the arm  42  and holds an upper end of the door glass  2 . The oscillator  40  makes oscillations in accordance with a required oscillatory wave form. 
     While in this embodiment, the oscillator  40  includes the body  41 , the arm  42 , and the holding part  43 , this should not be construed in a limiting sense. Another possible embodiment is that the oscillator  40  has another configuration capable of oscillating the door glass  2  exclusively. 
     The microphone is on an interior of the automobile and is fixed on a position, for example, as high as drivers&#39; ears. 
     The control system  70  includes a controller  71 , a storage  72 , an output unit  73 , an input unit  74 , and a synthesizer  75  of wave forms. The output unit  73  includes a display for power output. The input unit  74  includes keyboards and a mouse for power input. 
     The controller  71  includes CPU and controls the system as the whole in accordance with a controlling program. 
     The storage  72  includes a storage medium such as ROM and RAM. ROM stores the controlling program and the like. RAM temporarily stores datum. 
     The synthesizer  75  synthesizes two oscillatory wave forms transmitted by the controller  71 . Method of synthesizing the two oscillatory wave forms include: adding two oscillatory wave forms; and finding difference between the two oscillatory wave forms which is the difference between a first oscillatory wave form and a second oscillatory wave form. 
     Evaluation of the noise of the glass run by the evaluation system having this configuration will be discussed. 
     The glass run  10  and surroundings on a real automobile make noise when the door  1  is moved to a closed position from an opened position with the automobile stopped and when the automobile moves especially on bumpy roads. But the noise which is made when the door  1  is closed is not the same as the noise which is made when the automobile moves on bumpy roads. First, the method of evaluating the noise when the door  1  is closed will be discussed. 
     when the door  1  is closed (the automobile is stopped) 
     The sensor  20  for the door glass and the sensor  30  for the frame are fixed on the door glass  2  and the frame  100 , respectively, with the automobile stopped (the glass run  10  couples to the frame  100  of the real automobile). While in the present embodiment, the sensor  20  is fixed at an upper side part of the door glass  2  in an upper and a lower direction in relation to the automobile body and at a center in a front and a rear direction, and the sensor  30  is fixed at a center of the frame  100  on an extension line in the upper and the lower direction of the sensor  20  as illustrated in  FIG. 3 , this configuration should not be construed in a limiting sense. Any sensors  20  and sensors  30  are usable as long as the sensors  20  and the sensors  30  are fixed on the door glass  2  and the frame  100 , respectively. Examples of the usable sensor  20  and the usable sensor  30  include the contactless sensors as discussed above. 
     The door glass  2  is at a slight distance from the closed position. In the present embodiment, the door glass  2  is between a closed position and a half-open (½) position. 
     The door  1  is moved to the closed position from the opened position at a speed of 1.2 m/s. 
     When the door  1  is closed, a shock is generated and makes oscillation. The sensor  20  detects the oscillation of the door glass  2  and the sensor  30  detects the oscillation of the frame  100  simultaneously. The sensor  20  and the sensor  30  transmit detected information to the controller  71 . The controller  71  stores the oscillation of the door glass  2  as the oscillatory wave form  300  of the door glass and the oscillation of the frame  100  as the oscillatory wave form  400  of the frame at the storage  72 . 
       FIG. 6  illustrates an example of the oscillatory wave form  300  and the oscillatory wave form  400 . 
     The controller  71  transmits the oscillatory wave form  300  and the oscillatory wave form  400  to the synthesizer  75  of the wave forms. The synthesizer  75  synthesizes the oscillatory wave form  300  and the oscillatory wave form  400 , and picks out relative oscillation of the door glass  2  in relation to the frame  100  as a synthesized oscillatory wave form  500 . More specifically, the synthesized oscillatory wave form  500  is found by deducting value of the oscillatory wave form  400  from value of the oscillatory wave form  300 . The synthesizer  75  transmits the synthesized oscillatory wave form  500  to the controller  71 . The controller  71  stores the synthesized oscillatory wave form  500  at the storage  72 . 
       FIG. 7  illustrates the synthesized oscillatory wave form  500 , found by synthesizing the oscillatory wave form  300  and the oscillatory wave form  400  (deducting the oscillatory wave form  400  from the oscillatory wave form  300 ) of  FIG. 6 . 
     With this configuration, the sound of the glass run  10  alone is detected among sounds of various parts as well as the glass run  10  by picking out the relative oscillation of the door glass  2  in relation to the frame  100 . The sounds are made by the oscillation which is generated when the door  1  is closed. 
     The controller  71  reads out the synthesized oscillatory wave form  500 , stored at the storage  72 . The controller  71  makes oscillation by an oscillator  40  on an exterior of the automobile and oscillates the door glass  2  as illustrated in  FIG. 4 . 
     A microphone  50  on an interior of the automobile detects the sound accompanying the oscillation, and the controller  71  commands visualization of the sound. Methods of the visualization include coloring and shading as illustrated in  FIG. 8 . The output unit  73  visualizes the sound which is commanded to be visualized on a display.  FIG. 8  illustrates periodic sounds which are made at regular intervals relative to time. 
     Reading out and using the synthesized oscillatory wave form  500 , stored at the storage  72 , reproduces the oscillation of the glass run  10  and the sound accompanying the oscillation made on the real automobile when the door  1  is closed. Reproduction of the oscillation and the sound enables repeated experiments. 
     As a result, the glass run  10  is modified in shape and material in consideration of the oscillation of the glass run  10  when the door  1  is closed. 
     when the automobile moves on bumpy roads 
     In the same manner as “when the door  1  is closed (the automobile is stopped)” discussed above, the door glass  2  is at the slight distance from the closed position, and the sensor  20  for the door glass and the sensor  30  for the frame are fixed on the door glass  2  and the frame  100 , respectively, as illustrated in  FIG. 3 , with an exception that the real automobile moves. Examples of the usable sensor  20  and the usable sensor  30  include the contactless sensors as discussed above. 
     When the automobile moves, the shock is generated and makes the oscillation. The sensor  20  detects the oscillation of the door glass  2  and the sensor  30  detects the oscillation of the frame  100  simultaneously. The sensor  20  and the sensor  30  transmit detected information to the controller  71 . The controller  71  stores the oscillation of the door glass  2  as the oscillatory wave form  300  of the door glass at the storage  72  and the oscillation of the frame  100  as the oscillatory wave form  400  of the frame at the storage  72 . 
     The controller  71  transmits the oscillatory wave form  300  and the oscillatory wave form  400  to the synthesizer  75  of the wave forms. The synthesizer  75  synthesizes the oscillatory wave form  300  and the oscillatory wave form  400 , and picks out the relative oscillation of the door glass  2  in relation to the frame  100  as the synthesized oscillatory wave form  500 . More specifically, the synthesized oscillatory wave form  500  is found by deducting the value of the oscillatory wave form  400  from the value of the oscillatory wave form  300 . The synthesizer  75  transmits the synthesized oscillatory wave form  500  to the controller  71 . The controller  71  stores the synthesized oscillatory wave form  500  at the storage  72 . 
     With this configuration, sound of the glass run  10  alone is detected among the sounds of various parts as well as the glass run  10  by picking out the relative oscillation of the door glass  2  in relation to the frame  100  . The sounds are made by the oscillation which is generated when the automobile moves on the bumpy roads. 
     The controller  71  reads out the synthesized oscillatory wave form  500 , stored at the storage  72 . The controller  71  makes oscillation by an oscillator  40  on the exterior of the automobile and oscillates the door glass  2 . 
     The microphone  50  on the interior of the automobile detects the sound accompanying the oscillation, and the controller  71  commands visualization of the sound. Methods of the visualization include coloring and shading as illustrated in  FIG. 8 . 
     Reading out and using the synthesized oscillatory wave form  500 , stored at the storage  72 , reproduces the oscillation of the glass run  10  and the sound accompanying the oscillation made on the real automobile when the automobile moves on the bumpy roads. Reproduction of the oscillation and the sound enables repeated experiments with the automobile stopped. 
     As a result, the glass run  10  is modified in shape and material in consideration of the oscillation of the glass run  10  when the automobile moves on the bumpy roads. 
     The “bumpy roads” are hard to define precisely. The “bumpy roads” include road without pavement and rough roads as compared with smooth roads. Public highways may be the “bumpy roads” as compared with expressways. Also, expressways aged and worsened may be the “bumpy roads” as compared with expressways which has been just paved. 
     Accordingly, the present invention is applicable to the automobile which is moving. The present invention is effective in designing the glass run  10 , which does not make noise when the automobile moves on the roads in unfavorable conditions at least slightly. 
     In the present embodiment, the oscillator  40  makes the oscillation which corresponds to the synthesized oscillatory wave form  500  and oscillates the door glass  2  with the glass run  10  coupling to the frame  100  of the real automobile. Accordingly, the oscillation of the glass run  10  and the sound accompanying the oscillation when the door  1  is closed or when the automobile moves on the bumpy roads is reproduced. But, the oscillation of the glass run  10  and the sound accompanying the oscillation is reproduced on an experimental bench with the same configuration, not on the real automobile. 
     More specifically, the glass run  10  couples to a mock frame  101  on the experimental bench, for guiding a mock door glass  102  in the mock frame  101 , the oscillator  40  on the front surface of the mock door glass  102  makes the oscillation which corresponds to the synthesized oscillatory wave form  500  and oscillates the mock door glass  102 , the microphone  50  on a rear surface of the mock door glass  102  detects the sound of the oscillation which is made by the oscillator  40  and which corresponds to the synthesized oscillatory wave form  500 . The mock frame  101  corresponds to the frame  100 . The mock door glass  102  corresponds to the door glass  2 . 
     The output unit  73  visualizes the sound detected by the microphone  50  on the display. 
     The control system  70  may also include an amendment unit of wave forms as illustrated in  FIG. 9  to update the synthesized oscillatory wave form  500 . 
     An amendment control of wave forms is a step after the controller  71  makes oscillation which corresponds to the synthesized oscillatory wave form  500  by the oscillator  40  and oscillates the door glass  2 . The synthesized oscillatory wave form  500  is the relative oscillation of the door glass  2  in relation to the frame  100  and is picked out from synthesis of the oscillatory wave form  300  and the oscillatory wave form  400 , synthesized by the synthesizer  75 . 
     Referring to a flowchart illustrated in  FIG. 10 , the amendment control of wave forms is discussed. The controller  71  reads out the synthesized oscillatory wave form  500 , stored at the storage  72 . The synthesized oscillatory wave form  500  is picked out from synthesis of the oscillatory wave form  300  and the oscillatory wave form  400 . The controller  71  stores the synthesized oscillatory wave form  500  as a register  500   0  (step  101  (the word “step” omitted hereinafter)). 
     The controller  71  makes oscillation which corresponds to the synthesized oscillatory wave form  500  by the oscillator  40  on the exterior of the automobile and oscillates the door glass  2  artificially ( 102 ). The microphone  50  detects the sound accompanying the oscillation ( 103 ). 
     After detection of oscillations by the sensor  20  for the door glass and the sensor  30  for the frame, the controller  71  picks out a synthesized oscillatory wave form again when the door glass  2  is artificially oscillated to find the value. The controller  71  stores the value as a real synthesized oscillatory wave form  800  at a register  800  ( 104 ). The synthesizer  75  synthesizes the oscillatory wave form  300  of the door glass and the oscillatory wave form  400  of the frame, and picks out relative oscillation of the door glass  2  in relation to the frame  100  as the real synthesized oscillatory wave form  800 . The sensor  20  and the sensor  30  detect the oscillatory wave form  300  and the oscillatory wave form  400 , respectively. 
     The controller  71  compares the wave form at the register  800  with the wave form at the register  500   0  ( 105 ). The register  800  corresponds to the real synthesized oscillatory wave form  800 . The register  500   0  corresponds to the synthesized oscillatory wave form  500   0  of the oscillation of the glass run alone when the door is closed (the automobile is stopped) or when the automobile moves on bumpy roads as discussed above. The controller  71  checks if the difference is not more than a fixed value  700  ( 106 ). In the present embodiment, the controller  71  checks if an average of difference in amplitude of the synthesized oscillatory wave form is not more than the fixed value  700  over a plurality of hours. 
     In case the value of the register  800  is larger than the value of the register  500   0 , the controller  71  decreases output (power) from the oscillator  40  ( 107 ). On the other hand, in case the value of the register  800  is smaller than the value of the register  500   0 , the controller  71  increases output (power) of the oscillator  40  ( 108 ). 
     The rate of increase or decrease in the output from the oscillator  40  is determined beforehand and the output is increased or decreased gradually. 
     The controller  71  commands an amendment unit  76  of wave forms to update the synthesized oscillatory wave form  500  ( 109 ) such that the next oscillation made by the oscillator  40  corresponds to the synthesized oscillatory wave form which is amended by increasing or decreasing the output. 
     Going back to step  102 , the controller  71  makes oscillation which corresponds to the synthesized oscillatory wave form  500 , which is updated, by the oscillator  40 . Also, the controller  71  picks out the real synthesized oscillatory wave form  800  in the same manner. The real synthesized oscillatory wave form  800  varies depending on alteration in the output from the oscillator  40 . 
     When the difference between the wave form of the register  800  and the wave form of the register  500   0  is not more than the fixed value  700  as mentioned in step  105  as a result of repeated operations, the amendment control processing of wave forms is finished. The wave form of the register  800  corresponds to the real synthesized oscillatory wave form  800 . The wave form of the register  500   0  corresponds to the synthesized oscillatory wave form  500   0  of the oscillation of the glass run alone. 
     The sound finally detected by the microphone  50  in step  103  is the noise to be evaluated. The noise is subjected to a process of visualizing the sound. 
     While in this embodiment the microphone  50  always detects the sound every time the oscillator  40  makes oscillation, this should not be construed in a limiting sense. Another possible embodiment is that the microphone  50  detects the sound only once as illustrated in the flowchart of  FIG. 11 . More specifically, the controller  71  compares the wave form of the register  800  with the wave form of the register  500   0 . The register  800  corresponds to the wave form of the real synthesized oscillatory wave form  800 . The register  500   0  corresponds to the synthesized oscillatory wave form  500   0  of the oscillation of the glass run alone when the door is closed (the automobile is stopped) or when the automobile moves on bumpy roads as discussed above. When the difference between the wave form of the register  800  and the wave form of the register  500   0  is not more than the fixed value  700  (YES in step  105 ), the oscillator makes oscillation again ( 110 ), and the microphone  50  detects the sound accompanying the oscillation ( 111 ). 
     While in this embodiment in the comparison between the synthesized oscillatory wave form  500   0  and the real synthesized oscillatory wave form  800  in step  105 , the controller  71  checks if the average of the difference in amplitude of the synthesized oscillatory wave form is not more than the fixed value  700  over the plurality of hours, this should not be construed in a limiting sense. 
     While in this embodiment in the comparison between the synthesized oscillatory wave form  500   0  and the real synthesized oscillatory wave form  800 , the controller  71  checks the difference in amplitude between the synthesized oscillatory wave form  500   0  and the real synthesized oscillatory wave form  800 , and in case the difference (absolute value in difference) between the wave forms is more than the fixed value  700 , the output from the oscillator  40  is controlled to be increased or decreased. But this should not be construed in a limiting sense. Another possible embodiment as an alternative or as an addition to this embodiment is that the controller  71  checks difference in frequency between the wave forms, and in case the difference is detected, the real synthesized oscillatory wave form  800  is controlled to approach the synthesized oscillatory wave form  500   0 . 
     Another possible embodiment is that the controller  71  performs the processing which the amendment unit  76  of wave forms performs in the present embodiment without the amendment unit  76  of wave forms. 
     More specifically, the method further includes amending the wave forms after oscillating the door glass  2  on the real automobile. The real synthesized oscillatory wave form  800  is controlled to approach the synthesized oscillatory wave form  500   0 . The synthesized oscillatory wave form corresponds to the oscillation made by the oscillator  40 . The real synthesized oscillatory wave form  800  corresponds to the artificial oscillation made on the door glass  2 . With this configuration, the oscillation of the glass run  10  and the sound accompanying the oscillation, which are made on the real automobile, are reproduced on an experimental automobile more precisely. 
     Since the oscillator  40  makes the oscillation which corresponds to the synthesized oscillatory wave form and the artificial oscillation made on the door glass which corresponds to the real synthesized oscillatory wave form  800 , the real synthesized oscillatory wave form  800  should be the same as the synthesized oscillatory wave form  500   0 . But when the oscillator  40  makes the oscillation, a prop to which the oscillator  40  couples, for example, as well as the oscillator  40  oscillates and therefore, the oscillation is attenuated. Also, an environment surrounding the real automobile varies the oscillation. In this connection, amending the wave forms performs a feedback control to amend the difference such that the real synthesized oscillatory wave form  800  is the same as the synthesized oscillatory wave form  500   0 . 
     Amending the wave forms is also applicable to the experimental bench after oscillating the mock door glass  2  to evaluate the noise. 
     While in this embodiment the door glass  2  is between the closed position and the half-open (½) position when the sensor  20  for the door glass and the sensor  30  for the frame detect the oscillation, this should not be construed in a limiting sense. Another possible embodiment is that the door glass  2  is in the fully-opened position or in the closed position. But the door glass  2  is preferably at a distance from the closed position and at a distance from the fully-opened position. This is because the door glass  2  in the fully-opened position generates small width in the oscillation and is hard to transmit the sound to the interior of the automobile. 
     While in this embodiment, the sound is visualized by coloring and shading, this should not be construed in a limiting sense. Another possible embodiment is that weakness and strength in sound represents the sound.