Kolano and Saha Engineers Inc

Kolano and, United States

Kolano and Saha Engineers Inc

Kolano and, United States

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Saha P.,Kolano and Saha Engineers Inc. | Deshpande S.P.,Kolano and Saha Engineers Inc. | Moritz C.,Blachford Inc. | Sorenson S.,E A R Thermal Acoustic Systems
SAE Technical Papers | Year: 2015

Test standards are essential for evaluating the performance of a product properly and for developing a data base for the product. This paper discusses various standards that are available for determining the acoustical performance of sound package materials. The paper emphasizes various SAE standards that are available in this area, the reasons why these standards are important to the researchers working in the mobility industry, the history behind the development of these standards, and how they are different from standards that are available from other standards organization on similar topics. Copyright © 2015 SAE International.


Saha P.,Kolano and Saha Engineers Inc.
Sound and Vibration | Year: 2011

This article discusses the thought process that one needs to go through for developing an appropriate sound package treatment for a vehicle. In the development process, you need to put proper emphasis on understanding the source, path, and the receiver system. You need to have an understanding of how to reduce the noise at each location. You may need to conduct a feasibility study of the benefits of various noise control options. In terms of sound package treatments, you need to understand the fundamentals of acoustical materials, how they work, and why one material performs differently than another, as well as the importance of a well documented specification that every supplier has to meet.


Saha P.,Kolano and Saha Engineers Inc.
SAE Technical Papers | Year: 2011

This paper discusses the thought process that one needs to go through for developing an appropriate sound package treatment for a vehicle. In the development process one needs to put proper emphasis on understanding the source, path, and the receiver system. One needs to have an understanding on how to reduce the noise at the source, path, and/or receiver location. One may need to conduct a feasibility study of the benefits of various noise control options. In terms of sound package treatments one needs to understand the fundamentals of acoustical materials how they work and why one material performs differently than another one, as well as the importance of a well documented specification that every supplier has to meet. Copyright © 2011 SAE International.


Saha P.,Kolano and Saha Engineers Inc | Haylett J.,Commercial Vehicle Group Inc. | Roy R.K.,Nutek Inc
SAE International Journal of Materials and Manufacturing | Year: 2013

This paper discusses a design of experiments (DOE) analysis that was performed to understand relevant factors that influence the acoustic performance of a sound package part used in the commercial vehicle industry for the floor mat application. The acoustic performance of the sound package part which is a double wall system and constructed of a barrier and cellular decoupler material is expressed in terms of sound transmission loss (STL). An experiment was designed using the Taguchi DOE technique with three factors and three levels to acquire the STL data and is discussed in the paper. The results of the DOE analysis and the confidence in the model are discussed as well as the benefits of predicting expected STL performances are mentioned in the paper. © 2013 SAE International.


Saha P.,Kolano and Saha Engineers Inc. | Haylett J.,Commercial Vehicle Group Inc. | Roy R.K.,Nutek Inc.
SAE Technical Papers | Year: 2013

This paper discusses a design of experiments (DOE) analysis that was performed to understand relevant factors that influence the acoustic performance of a sound package part used in the commercial vehicle industry for the floor mat application. The acoustic performance of the sound package part which is a double wall system and constructed of a barrier and cellular decoupler material is expressed in terms of sound transmission loss (STL). An experiment was designed using the Taguchi DOE technique with three factors and three levels to acquire the STL data and is discussed in the paper. The results of the DOE analysis and the confidence in the model are discussed as well as the benefits of predicting expected STL performances are mentioned in the paper. Copyright © 2013 SAE International.


Kolano R.,Kolano and Saha Engineers Inc.
SAE Technical Papers | Year: 2013

This paper presents the design, construction, and implementation of a novel sound transmission loss (STL) testing fixture that is unique to the automotive industry. This fixture was built within a large 1.68 m high × 2.74 wide (56 × 90) opening in the wall between a 497 m3 (17,591 ft 3) reverberation room and an adjacent anechoic chamber. The fixture was designed and built to accommodate interchangeable plugs that allow STL measurements on an automotive buck as well as on flat sample materials. It features a removable sample holding frame system that simply and quickly clamps in place and acoustically seals with a pneumatically inflated seal. Copyright © 2013 SAE International.


Kolano R.,Kolano and Saha Engineers Inc. | Abhyankar S.,Ford Motor Company | Martin T.,Ford Motor Company
SAE Technical Papers | Year: 2013

This paper presents the upgrades and improvements needed to bring an old and seldom used reverberation room test suite up to current standards. The upgrades and improvements included eliminating a below-floor pit that was open to the reverberation room, improving the acoustical diffusion within the room, enlarging the opening between the reverberation room and an adjacent anechoic chamber, renovating the anechoic receiving chamber, constructing an innovative sound transmission loss test fixture, and installing of a high power reverberation room sound system. Copyright © 2013 SAE International.


Kolano R.A.,Kolano and Saha Engineers Inc
SAE International Journal of Passenger Cars - Mechanical Systems | Year: 2011

This paper presents an overview of the acoustical design of a small volume self-contained acoustical testing facility (SCATF). The design focuses on a small volume (25m 3) reverberation room for testing the random incidence sound absorption performance of small samples of acoustical materials and automotive parts. This reverberation room also couples to a small volume hemi-anechoic room and serves as the random incidence source room for sound transmission loss testing. These testing approaches respectively target the SAE J2883 (pending) and J1400 test standards. © 2011 SAE International.


Deshpande S.P.,Kolano and Saha Engineers Inc. | Rao M.D.,Tennessee Technological University
ASEE Annual Conference and Exposition, Conference Proceedings | Year: 2014

Traditional methods of measuring sound absorption coefficient and sound transmission loss of acoustic materials and treatments are time-consuming and expensive. To overcome this limitation, normal incidence sound absorption and transmission loss measurement technique using an impedance tube was developed. Unfortunately this equipment is equally expensive. This paper presents an effort made to develop a cost-effective impedance tube for wider use especially for educational use in emerging countries. An impedance tube capable of measuring absorption coefficient and transmission loss is designed and built under a budget of $1500 suitable for educational institutions in developing countries. The design, development and fabrication of the low-cost impedance tube along with measurement results demonstrating its accuracy is presented. Using a calibrated acoustic sample, data obtained from the low-cost impedance tube were compared with those from a standard commercial tube with encouraging results. A parametric study was conducted showing the effects of various parameters on the accuracy of the measured results. These include tube material, tube dimensions, frequency range, source transducer, pressure-microphones, sample and microphone holder, data acquisition and reduction technique. Based on these, design options were generated to meet the cost and functionality targets pre- Assigned. A list of suggested parts and vendors is also included for anyone interested to custom-build the tube. © American Society for Engineering Education, 2014.


Kolano R.,Kolano and Saha Engineers Inc.
SAE Technical Papers | Year: 2015

This paper presents the results of a study to reduce the background noise level within a large Quiet Room located adjacent to other laboratory testing environments and below a mechanical mezzanine which houses an extensive array of mechanical and electrical equipment including banks of low-temperature chiller compressors, air handling units, and electrical switchgear that serves the entire building complex. This equipment was installed atop the concrete mezzanine floor deck without provisions for isolating vibration. As a result, structure-borne noise from that equipment travels through the floor, radiates from the underside of the floor deck, and intrudes into the Quiet Room below. This causes the background noise level within the Quiet Room to be too high for conducting low sound level measurements and studies on vehicles brought into the Quiet Room. Conclusions of the study are that provisions originally intended to isolate the Quiet Room from the mezzanine floor deck were both insufficient and poorly installed, resulting in excessive noise transmitted into the Quiet Room. Recommended corrective measures include enhancement of the Quiet Room ceiling to improve the sound transmission loss performance of that assembly, and changes made to the mezzanine floor deck to isolate structure-borne noise. This work is being installed in phases and completion of the initial phase has shown very promising results. Copyright © 2015 SAE International.

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