However, the research evidence from this study is not directly transferable to the audiology clinic because the research study exposed test animals to a highly unusual procedure; a continuous sound enrichment composed of multiple high-frequency tones was presented over a number of weeks, commencing immediately after the noise trauma that induced the deafness.
The OFDM signal is a compound signal consisting of multiple frequency carriers, also called subcarriers or tones, that are each modulated in phase or in phase and amplitude.
Arbogast et al. (2002) realized this with sine-wave speech, created by filtering CRM sentences in multiple frequency bands, using the envelopes to modulate pure tones at the center frequencies of these bands, and subsequently summing together separate subsets of these tones to generate target and interfering signals.
GLM maps present the contrast of each of these tone predictors compared to the other predictors (e.g. high frequency vs. low and medium frequency tones), at a p<0.05 threshold (corrected for multiple comparisons [63]).
The parahippocampal-PCC current density differences might be load dependent, as noise-like tinnitus constitutes multiple frequencies in contrast to pure tone tinnitus.
The remote radio units, called remote terminals (RT), are connected to access nodes (AN) via orthogonal frequency division multiple access (OFDMA) over a fixed bandwidth with one RT active in each frequency tone.
The RTs belonging to each AN are separated from each other using orthogonal frequency division multiple access (OFDMA) with N tones over a fixed bandwidth, where only one RT is active at each frequency tone.
Every sound is a combination of multiple frequencies at different volumes.
Alertness was manipulated by the presence or absence of a short duration, high frequency tone.
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