Abstract: Various methods and apparatuses are provided to monitor a sound transportation passageway between an engine airway and a passenger cabin, detect a rupture in an air-tight sound-permeable barrier within the sound transportation passageway separating the engine airway and the passenger cabin, and responsively effect a warning and/or a corrective action.

Abstract: Various methods and apparatuses are provided to monitor a sound transportation passageway between an engine airway and a passenger cabin, detect a rupture in an air-tight sound-permeable barrier within the sound transportation passageway separating the engine airway and the passenger cabin, and responsively effect a warning and/or a corrective action.

Abstract: Methods and system for predicting sound pressure and/or sound pressure level caused by a vehicle horn are provided. An acoustic model of the horn is generated through the use of inverse numerical acoustics and boundary element methods. Additionally, an acoustic model of the vehicle is generated using boundary element methods. By combining these acoustic models and using the acoustic model of the horn as input into the acoustic model of the vehicle, sound pressure and/or sound pressure level at points within the acoustic domain encompassing the acoustic models can be predicted using boundary elements methods.

Abstract: Methods and system for predicting sound pressure and/or sound pressure level caused by a vehicle horn are provided. An acoustic model of the horn is generated through the use of inverse numerical acoustics and boundary element methods. Additionally, an acoustic model of the vehicle is generated using boundary element methods. By combining these acoustic models and using the acoustic model of the horn as input into the acoustic model of the vehicle, sound pressure and/or sound pressure level at points within the acoustic domain encompassing the acoustic models can be predicted using boundary elements methods.

Abstract: A reinforcing brace is disclosed. The reinforcing brace supports a collar of a fastener. In addition, the reinforcing brace is configured to strengthen the connection between a frame rail and a cross member. By aligning side walls of the reinforcing brace with walls of the cross member, the reinforcing brace can continue the walls of the cross member through the frame rail to strengthen the connection between the frame rail and the cross member.

Abstract: A method for measuring correlation between frequency response functions. A first frequency response function and a second frequency response function are acquired. The amplitude of the first and second frequency response functions are tabulated at a plurality of corresponding, predetermined frequencies. Amplitude and shape correlations between the first and second frequency response functions are then computed. The computed amplitude and shape correlations provide an indication of the degree of correspondence between the first and second frequency response functions, and can be used to compute a frequency response index that is an objective measure of the overall correspondence between the first and second frequency response functions.

Abstract: A reinforcing brace is disclosed. The reinforcing brace supports a collar of a fastener. In addition, the reinforcing brace is configured to strengthen the connection between a frame rail and a cross member. By aligning side walls of the reinforcing brace with walls of the cross member, the reinforcing brace can continue the walls of the cross member through the frame rail to strengthen the connection between the frame rail and the cross member.

Abstract: A reinforcing brace is disclosed. The reinforcing brace supports a collar of a fastener. In addition, the reinforcing brace is configured to strengthen the connection between a frame rail and a cross member. By aligning side walls of the reinforcing brace with walls of the cross member, the reinforcing brace can continue the walls of the cross member through the frame rail to strengthen the connection between the frame rail and the cross member.

Abstract: A reinforcing brace is disclosed. The reinforcing brace supports a collar of a fastener. In addition, the reinforcing brace is configured to strengthen the connection between a frame rail and a cross member. By aligning side walls of the reinforcing brace with walls of the cross member, the reinforcing brace can continue the walls of the cross member through the frame rail to strengthen the connection between the frame rail and the cross member.

Abstract: A method for measuring correlation between frequency response functions. A first frequency response function and a second frequency response function are acquired. The amplitude of the first and second frequency response functions are tabulated at a plurality of corresponding, predetermined frequencies. Amplitude and shape correlations between the first and second frequency response functions are then computed. The computed amplitude and shape correlations provide an indication of the degree of correspondence between the first and second frequency response functions, and can be used to compute a frequency response index that is an objective measure of the overall correspondence between the first and second frequency response functions.