Acoustical Engineer Interview Questions and Answers

Frequency can be derived from free/forced vibrations by analyzing the period of the vibrations.

• Frequency is the reciprocal of the period of the vibration.

• For free vibrations, the natural frequency of the system can be determined by analyzing the oscillations without any external force.

• For forced vibrations, the frequency can be determined by analyzing the response of the system to an external force at different frequencies.

• Frequency can also be calculated using the formula: f...read more

Antifriction bearings use rolling elements to reduce friction, while journal bearings use a sliding motion.

• Antifriction bearings use rolling elements like balls or rollers to reduce friction, while journal bearings use a sliding motion between the bearing surface and the shaft.

• Antifriction bearings have lower friction and higher efficiency compared to journal bearings.

• Examples of antifriction bearings include ball bearings, roller bearings, and needle bearings, while examples...read more

I tend to get too focused on details and may overlook the bigger picture.

• I have a tendency to get bogged down in technical details and may need to remind myself to step back and look at the overall project goals.

• I sometimes struggle with presenting technical information in a way that is easily understandable to non-technical stakeholders.

• I am always working to improve my knowledge and skills in areas where I may be weaker, such as signal processing or acoustical modeling.

Eigen values for free vibration represent the natural frequencies at which a system will vibrate without any external forces.

• Eigen values are the values of natural frequencies at which a system vibrates without any external forces.

• They are obtained by solving the characteristic equation of the system.

• Each eigen value corresponds to a mode shape, which describes the pattern of vibration.

• Higher eigen values indicate higher natural frequencies and shorter periods of vibration.

• Ei...read more

Mass matrix is a mathematical representation of the mass distribution of a system in structural dynamics.

• Mass matrix is used in structural dynamics to represent the mass distribution of a system.

• It is a square matrix that relates the accelerations of different points in a structure to the forces acting on those points.

• The mass matrix is typically diagonal for systems with uniform mass distribution.

• In finite element analysis, the mass matrix is used to calculate the dynamic re...read more