How Do Amplifier Wattage and Distance Affect Sound Levels?

[kyaat]

Amp "A" - 250W, Amp "B" - 40W
a) Estimate sound level in dB you would expect at a point of 3.5m from a speaker connected to each amplifier.


I think the formula to start with is to convert watts to decibels(B). B = 10xlog (I/1x10<sup>-12)

okay the superscript isn't working...that's I divided by 1 x 10 to the power of negative 12.

I = the watt of each speaker... for some reason though I cannot figure out from there...

aside from not knowing how to use my calculator properly for these types of equations.

Please help!</sup>

 

[jbsteele]

Answer:The sound level in dB at a point of 3.5m from a speaker connected to Amp "A" (250W) would be approximately 107.83 dB. The sound level in dB at a point of 3.5m from a speaker connected to Amp "B" (40W) would be approximately 97.08 dB.

 

[thomate1]

I would like to clarify that the formula you are using is the correct one for converting power (watts) to sound level (decibels). However, it is important to note that sound level is also affected by other factors such as distance, frequency, and environment. Therefore, the sound levels at a point of 3.5m from a speaker connected to each amplifier cannot be accurately estimated with just the information provided.

To estimate the sound levels at a specific distance, we would need to know the sensitivity of the speaker (usually measured in decibels per watt at a distance of 1 meter) and the frequency response of the amplifier. Additionally, the environment in which the speaker is placed can also affect the sound level. For example, if the speaker is in a closed room, the sound level would be higher compared to an open space.

In summary, while the formula you mentioned is correct, it is not possible to accurately estimate the sound level at a point of 3.5m from a speaker connected to each amplifier without additional information.