Sound level multiplications become decibel additions in reflections

Evidence

Because a multiplication of sound levels is equivalent to adding the decibels together, as shown in Chapter 1, Equation 6.3 can be expressed directly in terms of the decibels as: — David Howard, Jamie Angus, coustics and Psychoacoustics, 1762

Categorization

Category: Causal Relationships

Related

• Adding sound levels differs depending on whether sources are correlated or not. (similarity 0.84)
• Loudness perception is essentially logarithmic (similarity 0.84)
• Loudness perception requires a tenfold intensity increase to double (similarity 0.83)
• Decibel increases map powers of ten to logarithms (similarity 0.83)
• SIL and SPL always change in proportion even where their absolute values differ (similarity 0.82)
• Reflected sound intensity is reduced in proportion to the absorption coefficient (similarity 0.82)
• Sound pressure level and intensity level coincide only without reflecting surfaces (similarity 0.82)
• Intermediate separations cause loudness to follow intensity addition instead of pressure addition. (similarity 0.82)
• Decibel values must be converted to ratios before they can be added (similarity 0.82)
• Perceived loudness does not map one-to-one onto acoustic amplitude (similarity 0.82)
• Decibels cannot be summed directly because they are logarithmic power ratios (similarity 0.82)
• Reflected sound waves interfere with direct waves to create frequency peaks and dips (similarity 0.82)
• Room sound decay is exponential, appearing linear on a dB scale (similarity 0.82)
• Listener perception depends on sound power, direct sound, and reflections by frequency band (similarity 0.81)
• Room reflectivity at low frequencies determines bass elevation in measured steady-state curves (similarity 0.81)