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What is the overall transmission loss of a wall (12 mx 3 m) that has two...
13. What is the transmission coefficient of a wall whose sound transmission loss is 30 dB?...
13. What is the transmission coefficient of a wall whose sound transmission loss is 30 dB? What would be the sound intensity of a sound after passing that wall, if its intensity entering the wall was 2x10 watt/mº?
11. What is the sound tran Heat is the sound transmission loss of a wall whose...
11. What is the sound tran Heat is the sound transmission loss of a wall whose transmission coefficien 102What would be the sound intensity level of a sound after passing the all if its intensity level entering the wall was 70 dB? is 0.02? What
Answer question 2 1. Plot the transmission loss as a function of frequency between 100 Hz...
Answer question 2
1. Plot the transmission loss as a function of frequency between 100 Hz and 10 kHz for the following types of "walls": a) A sheet rock and stud wall, ?-20 kg/m2 b) A plaster, lath and stud wall. ?-60 kg/m2 c) A glass window, ?-8 kg/m d) A brick and plaster wall, o-450 kg/m2. e) A solid wood door, ?-35 kg/m2. f) A hollow core door, ?-5 kgm2 Calculate the transmission loss of a wall that is...
You are inside a room, 15 m from the west wall, which has two doors (similar...
You are inside a room, 15 m from the west wall, which has two doors (similar to slits) and you are centered between the two open doors that are 3 m apart. Someone is blaring a 200 Hz tone outside the door so that it enters the doors as a plane wave. You hear a maximum intensity in your current position. a. As you walk (north) along the direction of the west wall with the doors (but maintain a distance...
14. A room measures 3 mx 4 mx 2 m and is at 15°C and 1...
14. A room measures 3 mx 4 mx 2 m and is at 15°C and 1 atm. When the temperature is increased to 25°C, the number of molecules that escape from the room, assuming that the pressure stays at 1 atm, is 15. A room measures 3 mx 4 mx 2 m and is at 20°C and 1 atm. Assuming that it only has the two diatomic gases Nz and O2, the amount of kinetic energy in the gases is
A wireless communication system has a receiver sensitivity of -15 dBW. The loss due to distance...
A wireless communication system has a receiver sensitivity of -15 dBW. The loss due to distance is 12 dB. The gain of the transmitter and receiver antennas are 5dB and 3dB respectively. What is the required transmission power in dBW and in W?
Toielll 1. 40 points A typical transmission system is described below with each gain loss section...
Toielll 1. 40 points A typical transmission system is described below with each gain loss section having a prescribed gain or loss number. This system has the same input and output impedance levels (do not assume any numbers for them). Additional given information about this system is as follows: VA= 2 mvolts, mms PA = 2 mwatts Note: To receive credit for this problem you must insert all your 1. Calculate the output power in milliwatts at points B, C,...
A transmission line consists of two parts, the first part has a rating of 0.15 dB...
A transmission line consists of two parts, the first part has a rating of 0.15 dB / m with a length of 20 m. The second part has a length of 10 m with a rating of 0.959 dB / m and an impedance of 50 ohms. The reflected coefficient on the transmission line connection between the two parts is 0.3. The end of the second channel is connected with a load of 100 + j100 ohms. If the power...
You are inside a room, 15 m from the west wall, and centered between two open...
You are inside a room, 15 m from the west wall, and centered between two open doors (like slits) that are 3 m apart on the west wall. Someone is blaring a 200 Hz tone outside the room so that it enters the doors as a plane wave. You hear a maximum intensity in your current position. As you walk (north) along the direction of the west wall with the doors (but maintain a distance 15 m from the wall),...
(b) The brick wall of a building has dimensions of 4 m by 10 m, and it is 15 cm thick with a coefficient of thermal con...
(b) The brick wall of a building has dimensions of 4 m by 10 m, and it is 15 cm thick with a coefficient of thermal conductivity of 0.8 W.m1ec1. How much heat flows through the wall in a 12-hour period when the average inside and outside temperatures are 20 °C and 5 °C respectively? Will a 2 kW heater operating in the room compensate for the heat loss? Justify your answer. A layer of insulating material of thickness 5...
13. What is the transmission coefficient of a wall whose sound transmission loss is 30 dB? What would be the sound intensity of a sound after passing that wall, if its intensity entering the wall was 2x10 watt/mº?
11. What is the sound tran Heat is the sound transmission loss of a wall whose transmission coefficien 102What would be the sound intensity level of a sound after passing the all if its intensity level entering the wall was 70 dB? is 0.02? What
Answer question 2
1. Plot the transmission loss as a function of frequency between 100 Hz and 10 kHz for the following types of "walls": a) A sheet rock and stud wall, ?-20 kg/m2 b) A plaster, lath and stud wall. ?-60 kg/m2 c) A glass window, ?-8 kg/m d) A brick and plaster wall, o-450 kg/m2. e) A solid wood door, ?-35 kg/m2. f) A hollow core door, ?-5 kgm2 Calculate the transmission loss of a wall that is...
14. A room measures 3 mx 4 mx 2 m and is at 15°C and 1 atm. When the temperature is increased to 25°C, the number of molecules that escape from the room, assuming that the pressure stays at 1 atm, is 15. A room measures 3 mx 4 mx 2 m and is at 20°C and 1 atm. Assuming that it only has the two diatomic gases Nz and O2, the amount of kinetic energy in the gases is
A wireless communication system has a receiver sensitivity of -15 dBW. The loss due to distance is 12 dB. The gain of the transmitter and receiver antennas are 5dB and 3dB respectively. What is the required transmission power in dBW and in W?
Toielll 1. 40 points A typical transmission system is described below with each gain loss section having a prescribed gain or loss number. This system has the same input and output impedance levels (do not assume any numbers for them). Additional given information about this system is as follows: VA= 2 mvolts, mms PA = 2 mwatts Note: To receive credit for this problem you must insert all your 1. Calculate the output power in milliwatts at points B, C,...
(b) The brick wall of a building has dimensions of 4 m by 10 m, and it is 15 cm thick with a coefficient of thermal conductivity of 0.8 W.m1ec1. How much heat flows through the wall in a 12-hour period when the average inside and outside temperatures are 20 °C and 5 °C respectively? Will a 2 kW heater operating in the room compensate for the heat loss? Justify your answer. A layer of insulating material of thickness 5...
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