As soon as Sister-in-law Lin left, Wang Haixiang immediately asked meanly: "What can this prove from the conversation just now?" ”

"It proves that I didn't know that the beggar was Wu Lu at the time, and naturally I wasn't the one who made Wu Lu a beggar." Ling Li said disapprehantly.

"Just based on this, I want to prove that you don't know Wu Lu, it's a bit unsatisfactory, right? I don't think this evidence is useful at all. Wang Haixiang said.

"That's right, if you want to use it as evidence in court, it's really useless, because it can't directly prove that Ling Li doesn't know Wu Lu. To be correct, this is Ling Li's subjective verbal words, we are her friends and relatives will believe it, but the law is based on real evidence, and we will not believe one-sided words. Ling Junyan nodded and said.

"Brother, which side are you on? Don't even you believe me? Ling Li said dissatisfiedly.

"Brother is just seeking truth from facts, of course I believe you."

"So what are we going to do? Wu Lu is also dead now, and there is no proof of death, so why don't we accept it? Guo Wei said worriedly.

Ling Junyan replied confidently: "Not necessarily, in fact, it is very simple to tell whether the voice in the recorder is Ling Li's, as long as you do a 'voiceprint recognition' test, you can know if it is the same person." ”

Voiceprint recognition, also known as speaker recognition, is the spectrum of sound waves that carry speech information displayed by an electroacoustic instrument. There are two types, namely speaker identification and speaker confirmation, the former is used to determine which of several people said a certain speech, which is the "choose one" problem; The latter, which is used to confirm whether a certain voice is spoken by a designated person, is a "one-to-one judgment" problem.

The vocal organs used by people when speaking: tongue, teeth, throat, lungs, nasal cavity vary greatly from person to person in terms of size and morphology, so the voiceprint atlas of any two people will be different. The acoustic characteristics of each person's speech are both relatively stable and variable, and are not absolute and immutable. This variation can be physiological, pathological, psychological, simulative, camouflage, and also related to environmental disturbances. However, each person's articulatory organs are different, so in general, people can distinguish between different people's voices or determine whether they are the same person's voice.

"Yes, as long as it can be proved that the voice in the recorder is not Ling Li's, then everything will be clear? Why didn't I think of this, so I was busy in vain! Zhou Xuanjun clapped his hands and agreed.

"Brother Xuan Jun, it's really hard for you." Ling Li said embarrassedly.

"It's okay, that's it, let's collect Ling Li's voice now and go back to compare."

"In order to prevent anyone from doing anything, I will do it myself." Guo Wei said that he had to guard against his father, maybe he really did it!

"There's no need to trouble Young Master Guo, just leave this little matter to us." Wang Haixiang said.

"I've decided, let's start collecting Lily's voice now."

Ten minutes later, Guo Wei took Zhou Xuanjun to the side and secretly ordered some things, but Wang Haixiang wanted to eavesdrop and couldn't do it.

Ling Junyan could see Guo Wei's confidence in this matter, he was a strategic person, he was calm, calm, and made accurate judgments, with him, he believed that Ling Li's case should not be a problem.

"You go back to the police station first, and I'll be there later." Guo Wei said, so Zhou Xuanjun and Wang Haixiang and the other three left first.