Communication systems and communication methods capable of evaluating a voice quality in a voice communication of a communication network and a presence or absence of a call drop of the voice communication are provided. A voice communication of transceiving a test signal for voice communication quality evaluation between a communication terminal apparatus 100 and a voice communication evaluation system 400 via the communication network 300 is performed. A voice quality evaluation value is calculated based on the test signal before transmission and the test signal after reception in the voice communication. A presence or absence of a call drop of the voice communication is determined based on a presence or absence of reception interruption of the test signal.

Communication systems and communication methods capable of evaluating a voice quality in a voice communication of a communication network and a presence or absence of a call drop of the voice communication are provided. A voice communication of transceiving a test signal for voice communication quality evaluation between a communication terminal apparatus 100 and a voice communication evaluation system 400 via the communication network 300 is performed. A voice quality evaluation value is calculated based on the test signal before transmission and the test signal after reception in the voice communication. A presence or absence of a call drop of the voice communication is determined based on a presence or absence of reception interruption of the test signal.

A method of tuning a hearing device includes sending a test signal to a model of a hearing device that may be remote from the actual hearing device being tuned. The test signal is encoded by the model and sent to the hearing device being tuned. The user of that hearing device sends a response signal based at least in part on the encoded test signal. This response is received and compared to the original test signal. Thereafter, an operational parameter is sent to the hearing device based on the comparison.

A method of tuning a hearing device includes sending a test signal to a model of a hearing device that may be remote from the actual hearing device being tuned. The test signal is encoded by the model and sent to the hearing device being tuned. The user of that hearing device sends a response signal based at least in part on the encoded test signal. This response is received and compared to the original test signal. Thereafter, an operational parameter is sent to the hearing device based on the comparison.

A call test system sets up a call between a calling terminal and a called terminal. The call test system generates an original signal in a first format and converts it to a second format which can be stored in a memory of the calling terminal. The calling terminal sends the signal in the second format over the channel to the called terminal. The called terminal stores the received signal in the second format and sends it to the call test system. The call test system converts the received signal in the second format to the first format and compares it with the original signal in the first format. The comparison may be in the time domain and/or the frequency domain.

A call test system sets up a call between a calling terminal and a called terminal. The call test system generates an original signal in a first format and converts it to a second format which can be stored in a memory of the calling terminal. The calling terminal sends the signal in the second format over the channel to the called terminal. The called terminal stores the received signal in the second format and sends it to the call test system. The call test system converts the received signal in the second format to the first format and compares it with the original signal in the first format. The comparison may be in the time domain and/or the frequency domain.