|
Lower and
higher tones masking each other (Note: you may want to use headphones for these tests) |
A
masking tone alternates (4 times) with a test tone decreasing in 10
steps. Count how many steps you can hear with the test tone.
There are two cases: A) the masking tone is 1200 Hz and the test tone is 2000 Hz; B) the masking tone is 2000 Hz and the test tone is 1200 Hz. Answer here. |
Test 2. Backward Masking
| Backward
masking
of a tone by noise |
A test tone (2 kHz) heard first alone is then followed by a
brief time gap and then a noise burst (in a similar frequency range).
The test tone decreases in 10 steps. Count how many steps you can hear.
The ramp is heard three times: A) the time gap is 100 ms; B) the time gap is 20 ms; C) the time gap is 0 ms. Answer here. |
Test 3. Forward Masking
|
Forward
masking
of a tone by noise |
A test tone (2 kHz) is preceded by a brief time gap which is
also preceded by a noise burst (in a similar frequency range). The test
tone decreases in 10 steps. Count how many steps you can hear with the
test tone.
The ramp is heard three times: A) the time gap is 100 ms; B) the time gap is 20 ms; C) the time gap is 0 ms. Answer here. |