The Auditory Resolution Training Module provides you with the opportunity to listen to and distinguish sounds differed in one specific domain, such as spectral, temporal, and amplitude etc. This training group is aimed at improving the ability to discriminate the subtle acoustic difference among these sound, thus improving speech understanding. This training module covers frequency discrimination, modulation detection, temporal gap detection, amplitude discrimination, forward masking, and pure tone detection. Group 1: Frequency Discrimination Training The Frequency Discrimination Group provides you with the opportunity to listen to and distinguish sounds differed in the frequency domain. This training group is aimed at improving the ability to discriminate the subtle frequency difference among these sound, thus improving speech understanding. The first three tasks are targeted at music notes while the last one is targeted at 1kHz pure tone. 3AFC (3 alternative forced choice) will be used for all auditory resolution training. In this protocol, the computer will play three sounds, the listener has to identify which sound is different from the other two. The difference (in this case, frequency) between the reference and target signal will be adaptively adjusted according to the response of the listener. Basically, the difference will be gradually reduced when the response is correct and increased when the resposne is not correct. Group 2: Modulation Detection Training The Modulation Detection Group provides you with the opportunity to listen to and distinguish sounds differed in the temporal modulation. This training group is aimed at improving the ability to discriminate the subtle temporal flunctuation difference among these sound, thus improving speech understanding. All five tasks are similar except that the modulation frequency is different (10, 20, 50, 100, and 200 Hz). Stimuli for all signals with different modulation depth. No=no modulation; -40=1% of modulation depth; 0=100% of modulation depth. Group 3: Modulation Frequency Discrimination The Modulation Frequency Discrimination Group provides you with the opportunity to listen to and distinguish sounds differed in the temporal modulation. This training group is aimed at improving the ability to discriminate the subtle temporal flunctuation difference among these sound, thus improving speech understanding. All five tasks are similar except that the modulation frequency is different (10, 20, 50, 100, and 200 Hz). Stimuli for all signals with different modulation frequency: Group 4: Temporal Gap Detection Training The Temporal Gap Detection Group provides you with the opportunity to listen to and distinguish sounds with gap in between. This training group is aimed at improving the ability to discriminate the subtle temporal gap among the signals, thus improving speech understanding. The gap is located in the middle of two signals. These signals can be the same or different. Three signals are used, including noise, 1kHz, and 2kHz pure tones. Stimuli for signals with different gaps: Waveform for signals with different gaps: Group 5: Amplitude Discrimination Training The Amplitude Discrimination Group provides you with the opportunity to listen to and distinguish sounds with different levels. This training group is aimed at improving the ability to discriminate the subtle amplitude difference among the signals, thus improving speech understanding. Three signals are used, including noise, 1kHz, and 2kHz pure tones. Group 6: Tone Detection with Masker (Forward Masking) Training The Tone Detection with Masker Group provides you with the opportunity to listen to and distinguish sounds when there is a masking signal . This training group is aimed at improving the ability to detect a sound when there is an interefering signal, thus improving speech understanding. The masker is white noise while the probe signal is a 1kHz tone. The gap between betwen masker and probe varies from 10ms to 100ms. Group 7: Puretone Threshold Detection Training The Pure Tone Threshold Group provides you with the opportunity to listen to and detect very weak sounds. This training group is aimed at improving the ability to detect a weak sound, thus improving speech understanding. Five different pure tones are used in this group, including 250, 500, 1000, 2000, and 4000 Hz. Group 8: Music Rhythm Test and Training The Music Rhythm Test and Training Group provides you with the opportunity to listen to and distinguish musical rhythms in a melodic sequence. This training group is aimed at improving the ability to listen to the subtle rhythmic changes, thus improving music appreciation. All six tasks are similar except that the change occurs in 2nd or 3rd notes with either flat, rising, or falling note patterns. List of stimuli with different gaps Waveform view of contours with different rhythms