Signal tone

Ringback music, also called personalized ringback tone, is a piece of music heard by the caller instead of the traditional telephone ring signal when a telephone call is placed.

彩铃，也就是个性化的电话铃音，当有电话响时用一首歌代替了传统的电话铃声。

By analysis based on time-domain and frequency-domain, the producing and formative mechanism of acoustic signal is approached, and the tone channel is put forward.

基于电弧声信号的时域与频域特征分析，讨论了电弧声产生机理，提出了电弧声道概念。

A language that uses tones to signal "word meanings and grammatical categories" is called Tone Language.

凡是用声调作为手段来表示“词汇意义和词的语法意义”的语言，被称为“声调语言”；

This paper, based on the measurement of the impedance-frequency characteristics and attenuation characteristics of the city telephone line network, proposes a method of FDM to transfer carrier signal, such as digital modulation signal, tone carrier signal, etc.

在对市内电话信道阻抗特性、衰耗特性测试的基础上，提出市话线路可采用频分复用的方法传递载波信号，如数字调制信号、语言载波信号等。

From simulation results, the third-order inter-modulation distortion ratio ( IMD3) can be reduced by-10 dB on average when a two-tone signal is input. Finally, the bias-controlled predistorter has been used in OFDM system.

从仿真结果可以总结出，当系统采用双音信号作为输入时，功率放大器输出的三阶互调失真可以平均减少10dB。最后，将二极管偏压控制预失真器应用于OFDM系统中。

An use of signal tone in the telephone network and statistical characteristic analysis of voice interference with the tone

电话网中信号音的利用及话音对其干扰的统计特性分析

I tried to call you several times, but there was no signal tone on your line.

不是他电话一直占线，是他的电话一直没有信号。打过去没有接受的声音的。

Now a stored program control switch is simulated on a cheap micro-computer. All hardware movements of it are realized by software simulation, and calling processing can be carried out. It has various functions such as signal tone, ringing and talking etc.

在廉价的微机上实现程控数字交换机的模拟，该模拟交换机所有硬件动作均由软件模拟完成，它能进行呼叫处理，并有各种信号音、振铃和通话等各种功能。