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1. Determine the sum of the following sound levels (all in decibels): 68, 82, 76, 68, 74 and 81

1. Determine the sum of the following sound levels (all in decibels): 68, 82, 76, 68, 74 and 81

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**Sound Level Problems and Analysis** 1. **Determine the Sum of Sound Levels** - Calculate the sum of the following sound levels (in decibels): 68, 82, 76, 68, 74, and 81. 2. **Noise Source Frequency Analysis** - A law enforcement officer has recorded the following sound level readings: 80 dBA, 84 dBB, and 90 dBC. Identify if the noise source is predominantly a low or middle-frequency emitter. 3. **Estimating Number of Active Chippers** - A reading of 127 dB was recorded near construction chippers. When only one chipper was stopped, the reading was 120 dB. Estimate the number of chippers when the 127 dB reading was obtained, treating the sources as ideal point sources located at the same point. 4. **Noise Level in a Neighborhood** - Analyze the following noise record obtained in a home's front yard to determine if the neighborhood is relatively quiet or noisy. Find the equivalent continuous equal energy level. | Time (Hours) | Sound Level (dBA) | |--------------|-------------------| | 0000 – 0600 | 42 | | 0600 – 0800 | 45 | | 0800 – 0900 | 50 | | 0900 – 1500 | 47 | | 1500 – 1700 | 50 | | 1700 – 1800 | 47 | | 1800 – 0000 | 45 | 5. **Average Sound Pressure Level Calculation** - Compute the average sound pressure level from these readings (42, 50, 65, 71, and 47 dB) using both simple arithmetic averaging and logarithmic averaging. Analyze whether arithmetic averaging underestimates or overestimates the sound pressure level.
Transcribed Image Text:**Sound Level Problems and Analysis** 1. **Determine the Sum of Sound Levels** - Calculate the sum of the following sound levels (in decibels): 68, 82, 76, 68, 74, and 81. 2. **Noise Source Frequency Analysis** - A law enforcement officer has recorded the following sound level readings: 80 dBA, 84 dBB, and 90 dBC. Identify if the noise source is predominantly a low or middle-frequency emitter. 3. **Estimating Number of Active Chippers** - A reading of 127 dB was recorded near construction chippers. When only one chipper was stopped, the reading was 120 dB. Estimate the number of chippers when the 127 dB reading was obtained, treating the sources as ideal point sources located at the same point. 4. **Noise Level in a Neighborhood** - Analyze the following noise record obtained in a home's front yard to determine if the neighborhood is relatively quiet or noisy. Find the equivalent continuous equal energy level. | Time (Hours) | Sound Level (dBA) | |--------------|-------------------| | 0000 – 0600 | 42 | | 0600 – 0800 | 45 | | 0800 – 0900 | 50 | | 0900 – 1500 | 47 | | 1500 – 1700 | 50 | | 1700 – 1800 | 47 | | 1800 – 0000 | 45 | 5. **Average Sound Pressure Level Calculation** - Compute the average sound pressure level from these readings (42, 50, 65, 71, and 47 dB) using both simple arithmetic averaging and logarithmic averaging. Analyze whether arithmetic averaging underestimates or overestimates the sound pressure level.
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