Figure 4
From: Effects of sound source localization of masking sound on perception level of simulated tinnitus
Masking effects on simulated tinnitus. (A) Sound pressure required to mask the simulated tinnitus in all inspections: headphone or speaker. In 71% (42/59) of measurements, simulated tinnitus could be masked at a lower sound pressure when the masking noise was delivered from the speaker (closed symbols). (B) Sound pressure required to mask simulated tinnitus of different intensities. Simulated tinnitus 20 dB above the hearing threshold was masked by the noise provided from the speaker at a significantly lower sound pressure level than the noise from the headphone. The horizontal bar next to the plot shows the mean, and the vertical error bars represent the standard deviation.
