Comparisons show that increasing the absorption coefficient at the back wall can increase the speech intelligibility metric U50 to the largest extent in the classroom.
In the meantime, it is noticed that the compression rates and the residual intelligibility are not remarkably related, which means one can choose the compression ratio adaptively without increasing the residual intelligibility.
When a TTS system is used to make a computer system pronounce a certain text toward a user, the addition of a visual signal displaying a person speaking this text will indeed increase both the intelligibility and the naturalness of the communication.
As stated earlier, when video accompanies the acoustic utterance, it increases the speech intelligibility, thanks to the visual information brought by the lips' movements [5].
A portable amplifier, for example, may be used to increase the volume of speech and thus its intelligibility.
Hence, in hearing aid algorithms, it is important to increase the signal-to-noise ratio (SNR) of the desired sound source in order to improve speech intelligibility.
In the meantime, it should attain residual intelligibility as low as possible and provide keyspace as large as possible to increase the cryptogram immunity to cryptanalysis.
During the test, the psychologist verified the due intelligibility of the items in the questionnaire: two items were rephrased with the help of patients, parents and the psychologist to increase the clarity.
An energy redistribution voiced/unvoiced (ERVU) method was proposed to improve intelligibility without increasing the output power [16].
One of the most challenging problems found in the design of hearing aids is the reduction of undesired noise and interference signals to increase speech intelligibility without introducing audible distortions in the target speech.
