USRE39010EExpiredUtility

Lightweight acoustical system

80
Assignee: LEAR CORPPriority: Jun 2, 2000Filed: Jun 13, 2002Granted: Mar 14, 2006
Est. expiryJun 2, 2020(expired)· nominal 20-yr term from priority
Inventors:Laura E. GishLiangyu HuangGordon EbbittBarry WyermanDavid A. Boyles
B60R 13/083B60R 13/0892G10K 11/162G10K 11/168B32B 2307/10B32B 27/12B32B 2471/02B32B 2307/7265B32B 2323/04B32B 5/26B32B 27/32
80
PatentIndex Score
28
Cited by
33
References
32
Claims

Abstract

An improved acoustical system for inhibiting noise in a motor vehicle. The system comprises an impermeable layer and an underlayment adjacent to the impermeable layer. The underlayment includes a first fibrous layer and a second fibrous layer. The underlayment has an airflow resistance between about 2000 and about 5000 mks Rayls.

Claims

exact text as granted — not AI-modified
1. An acoustical system comprising:
 a water-impermeable layer;  
 an underlayment adjacent to the impermeable layer, the underlayment including a first fibrous layer and a second fibrous layer, the first fibrous layer having a density less than a density of the second fibrous layer;  
 the underlayment having a specific airflow resistance between about 2000 and about 5000 mks Rayls; and  
 a semi-permeable layer disposed between the first and second fibrous layers.  
 
     
     
       2. The acoustical system of  claim 1  wherein the semi-permeable layer comprises a film. 
     
     
       3. The acoustical system of  claim 1  wherein the first fibrous layer has a surface density between about 500 grams per square meter and about 1400 grams per square meter. 
     
     
       4. The acoustical system of  claim 1  wherein the second fibrous layer has a surface density between about 500 grams per square meter and about 1400 grams per square meter. 
     
     
       5. The acoustical system of  claim 1  wherein the second fibrous layer is adjacent to the impermeable layer. 
     
     
       6. The acoustical system of  claim 1  wherein the second fibrous layer is a composite. 
     
     
       7. The acoustical system of  claim 1  wherein the underlayment is situated between the impermeable layer and a noise source. 
     
     
       8. The acoustical system of  claim 1  further comprising a decorative layer situated adjacent to the impermeable layer. 
     
     
       9. A carpet with noise-inhibiting characteristics for use in a motor vehicle, the carpet comprising:
 a water-impermeable layer; and  
 an underlayment adjacent to the impermeable layer, the underlayment including a first fibrous layer and a second fibrous layer, the first fibrous layer having a density less than a density of the second fibrous layer;  
 the underlayment having a specific airflow resistance between about 2000 and about 5000 mks Rayls;  
 wherein the first and second fibrous layers have a surface density between about 500 grams per square meter and about 1400 grams per square meter.  
 
     
     
       10. The carpet of  claim 9  further comprising a semi-permeable layer disposed between the first and second fibrous layers. 
     
     
       11. The carpet of  claim 10  wherein the semi-permeable layer comprises a film. 
     
     
       12. The carpet of  claim 9  wherein the second fibrous layer is adjacent to the impermeable layer. 
     
     
       13. The carpet of  claim 9  wherein the second fibrous layer is a composite. 
     
     
       14. The carpet of  claim 9  wherein the underlayment is situated between the impermeable layer and a noise source. 
     
     
       15. The carpet of  claim 9  wherein the first layer is situated between the second layer and a noise source. 
     
     
       16. A system for inhibiting noise in a motor vehicle, the system comprising:
 an impermeable layer; and  
 an underlayment adjacent to the impermeable layer, the underlayment including a first fibrous layer, a second fibrous layer, and a semi-permeable layer, the first layer having a surface density between about 500 grams per square meter and about  1400 grains grams  per square meter, and the second layer having a surface density between about 500 grams per square meter and about 1400 grams per square meter;  
 the underlayment having a specific airflow resistance between about 2000 and about 5000 mks Rayls.  
 
     
     
       17. An acoustical system comprising:
   a water - impermeable layer;        an underlayment adjacent to the impermeable layer, the underlayment including a first layer and a second layer, the first layer having a density less than a density of the second layer, and a semi - permeable layer disposed between the first and second layers; and        the underlayment having a specific airflow resistance between about  2000  and about  5000  mks Rayls.     
     
     
       18. The acoustical system of  claim 17  wherein the semi- permeable layer comprises a film.   
     
     
       19. The acoustical system of  claim 17  wherein the first layer has a surface density between about  500  grams per square meter and about  1400  grams per square meter. 
     
     
       20. The acoustical system of  claim 17  wherein the second layer has a surface density between about  500  grams per square meter and about  1400  grams per square meter. 
     
     
       21. The acoustical system of  claim 17  wherein the second layer is adjacent to the impermeable layer. 
     
     
       22. The acoustical system of  claim 17  wherein the second layer is a composite. 
     
     
       23. The acoustical system of  claim 17  wherein the underlayment is situated between the impermeable layer and a noise source. 
     
     
       24. The acoustical system of  claim 17  further comprising a decorative layer situated adjacent to the impermeable layer. 
     
     
       25. A carpet with noise- inhibiting characteristics for use in a motor vehicle, the carpet comprising:      a water - impermeable layer; and        an underlayment adjacent to the impermeable layer, the underlayment including a first layer and a second layer, the first layer having a density less than a density of the second layer;        the underlayment having a specific air flow resistance between about  2000  and  5000  mks Rayls;        wherein the first and second layers have a surface density between about  500  grams per square meter and about  1400  grams per square meter.     
     
     
       26. The carpet of  claim 25  further comprising a semi- permeable layer disposed between the first and second layers.   
     
     
       27. The carpet of  claim 26  wherein the semi- permeable layer comprises a film.   
     
     
       28. The carpet of  claim 25  wherein the second layer is adjacent to the impermeable layer. 
     
     
       29. The carpet of  claim 25  wherein the second layer is a composite. 
     
     
       30. The carpet of  claim 25  wherein the underlayment is situated between the impermeable layer and a noise source. 
     
     
       31. The carpet of  claim 25  wherein the first layer is situated between the second layer and a noise source. 
     
     
       32. A system for inhibiting noise in a motor vehicle, the system comprising:
   an impermeable layer; and        an underlayment adjacent to the impermeable layer, the underlayment including a first layer, a second layer, and a semi - permeable layer, the first layer having a surface density between about  500  grams per square meter and about  1400  grams per square meter, and the second layer having a surface density between about  500  grams per square meter and about  1400  grams per square meter;        the underlayment having a specific airflow resistance between about  2000  and about  5000  mks Rayls.

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