This is a plan to invite people who are active in various fields related to sound and talk about various themes about "sound" by our chief scientist.
The first time, we talked to Dr. Kazuhiko Kawahara of the Kyushu University Graduate School of Arts and Engineering, which FINAL is currently conducting joint research. I wrote the text as it was, so I think there is something difficult to read, but I think that you can feel the words of the speaker from the text.
I will share the story that I heard for about 4 hours into the main items. Part 5 is "What is hearing formation?"
Kyushu University Graduate School of Arts and Engineering Dr. Kazuhiko Kawahara
・ What is hearing formation?
・ What is hearing formation?
Kyushu University Faculty of Arts and Engineering Hearing Classroom
Kyushu University Faculty of Arts and Engineering Hearing Classroom
Kyushu University Faculty of Arts and Engineering Hearing Classroom
Kyushu University Faculty of Arts and Engineering Hearing Classroom
Hamasaki: Regarding hearing formation, it is an initiative that has been in class since the opening of the school earlier, so please introduce it a little in detail. First of all, please refer to what is going on with what you are doing now, including what you are doing now. please.
Kawahara: Hearing formation is the hearing impression of the sound, the feeling of hearing, and when you learn the hearing and sound physical indicators, first of all. As a result, it claims to be a comprehensive curriculum for acoustic technicians who foster sound sensitivity. The keyword is a comprehensive curriculum for acoustic engineers. It is important to acquire the sound and physical properties. The acoustic design of Kyushu University is opened in the first year. Until last year, I had been in the first year of the first grade, but since there was a reorganization, I have been in the first grade of the first grade since last year. Perhaps the first graders are taking classes on another campus, so we will carry the equipment, but in the latter half of that year, the lesson was a face -to -face class. It's a rumor that it's not. I don't know because I haven't talked to the second grader yet, but I did it face to face with the current second grader. There are many reasons for this. Hearing formation, especially when you are in the first grade, not only listening to the sound suddenly, but also classes and lectures after crushing such things as sound pressure, sound pressure level, frequency, spectrum, etc. It is a lecture, if you do training together with the lecture. Looking at the questionnaire or report, it looks like a class where you can feel the sound of the sound or the feeling of the sound design course, so you can enjoy it relatively and enjoy it. I am making a curriculum, but first, please do it properly to listen to the sound.
Hamasaki: What is the real and training period of training in the first year?
Kawahara: Six months. 15 times. 15 weeks.
Hamasaki: It was less than before. I was doing it for two years.
Kawahara: Currently, hearing formation I is six months, hearing formation II is half a year, a total of one year. When I was a student, I was a whole year when the hearing form was a freshman. When I was in my second year, there was a hearing formation II all year round, and it was a total of two years.
Hamasaki: Also, in terms of identity, do you still do Solfege or piano performance, or what you don't do in ordinary engineering departments?
Kawahara: That's right. Solfege is gone, but the piano is doing it. I also do music theory classes. Such piano lessons and music classes can only be opened after the second grade. Then, the only class where the first graders can realize that they have entered the acoustic design, only hearing formation I in the latter half. I think it would be better to take a class that would make you think that there would have been a lot of entry, and I. So, it takes time, but carry the equipment every time, install and adjust. I wonder if I will adjust it. But I want to check the sound pressure level with the test sound source. Otherwise, lectures will be performed well in the motivation to be a second grader or the connection with the second grader specialty. Change the sound pressure, the loudness of the sound, or just the pascal, and to convert it to Decibel. 10 Desibel 5 What is close to the dibel, what is the pure sound of 1 kilometer, what is the band noise of 1 kilometer, and what is the one -kilometer hill? Even if you write it in a report, you will be able to listen to it after training, a report that is overflowing with such a thing, a report or impression that you have such a confidence. I think it was good to do it because there are many. In the second grade, I do training that is related to quality a little more, so I am Professor Takada. After that, although it is in the quality, along with the sound source that changes the number of digital signals quantized bits, or the training that allows you to distinguish the quantization noise, you can put the bridging training of the next learning digital signal processing. I'm doing it. I myself are related to the alumni association of the Faculty of Arts and Engineering, and even if I talk with graduates in various ways, it is natural that there is a hearing formation. I think that the impact of hearing formation is that the quality and sound characteristics can be conveyed without ambiguous. So, when you are collaborating with Company A and Company B, if you are from a performing art in between, you can convey the quality of the sound properly, or just because you are from acoustic, but in the backbone and background. The foundation is that there is a hearing formation, and based on that, it seems that there is a physical explanation of the quality of the sound, so I am working on it myself. is.
Hamasaki: Thank you. Then, can you explain in detail the hearing formation?
Kawahara: Hearing formation is not to train blindly. I summarized the learning phase of hearing formation with Dr. Iwamiya. It's a phase where you can understand the difference by listening to the sound first. First, you can understand that the different sounds are different or that the same sound is the same. Before associated with physical things, the same sound, different sounds, what's different? For example, when you change the frequency, you know what you feel. This is the training that Saishoa Test is a CARL EMIL SEASHORE, a researcher like a classic of music acoustics, suggested in SP records. Rather than training, I feel like practicing to concentrate on the sound and listen, rather than being able to understand too much. So, when you start with such a simple task, you can see the difference in sound. Next, the difference can be recognized as a physical difference in parameters. For example, you can listen to the size of a 10 -dibel different sound, what Hertz's pure sound, and so on. This is the main part of hearing formation. It is interpreted by Dr. Iwaomiya, but if you can recognize such a difference as a physical parameter, you can give the sound of what kind of Hertz and what decibel sounds, and the sound of the small sound. You will be able to imagine. This is, for example, looking at a graph, looking at the graph of the dissertation or the survey result, you can imagine such a sound, and you can have an important ability in such a place. The part of the imagination is not actually training, but the imagination is a common experience for everyone. I believe that I can share the image of the sound because I can share my imagination when I do it. So, as I said earlier, when graduates of sound are working in different companies and collaborating, when sharing the image properly, using physical quantities without using onomatopoeia to share sound quality and quality. What you can do is the impact of hearing formation. So, through these activities, I want to spread it.
Hamasaki: The physical volume of the physical quantity I talked about is the frequency, the sound pressure and the band spectrum. In addition, there are physical quantities such as strain rate, for example. Or is it the direction of the sound or the reverberation time in both earnings?
Kawahara: The reverberation time is doing. It's a strain, but it's often said, it's pointed out, but it's suggested or suggested. If you think about this, you may be able to hit the distortion, how many percent of this sound is. There are various distortions, and it can not be expressed with only the strain rate, so it is a problem. So, as a training for strain, I worked hard to think about the number of bits of quantization. So, there are some opinions that the number of quantized bits is actually better at bit rate, or that it is better to have a transmission bit rate. However, for example, in the case of MP3, the performance of the encoder does not make sense, and there is no reference encoder, or in fact, Apple's iTunes is formulating the MP3 standard. I'm in trouble because I'm using the algorithm, so I'm not using MP3 while talking about it is good. Bit rate, strain rate, and strain are one of the items that I want to experience, try to do something only in a certain strain, or some distortions like clips and some kinds of strain. I'm thinking that I can mix and answer, or if I can do that, and I'm thinking about making a sound source when I get time. It takes a lot of work because the loudness must not change. Even now, there is a rowdones judgment, such as a frequency characteristic, so it is more difficult to hear a loud sound of one kilometer, so that it does not become a clue.
Hamasaki: Thank you. Hearing formation is a vocational meaning for acoustic technicians, that is, as a job, or for those who handle sounds. On the other hand, those who have experienced hearing formation earlier are not so -called impression words to express sounds, but physical terms, for example, this sound has a 2dB peak per kHz. If you do that, you will be able to share the awareness of the problem with each other. On the other hand, some people say that it is a private audio, a hobby audio, for example, this earphone has a peak of about 10 kHz, but many are many words, the meaning of the sound. Is an impression. But even if the word is the same, I don't know if the person is really saying and what I feel. Is that the problem because it's a hobby? Is it a good direction for those who enjoy audio with such a more objective conversation? How about that?
Kawahara: I am a hearing formation as a literacy for enjoying audio. It may not be that you can enjoy audio because the score of hearing formation is high, but I think it would be nice to have a person who did some hearing formation and enjoy the audio while enjoying the audio. Regardless of the audio, music also has a meaning like a solfege, the occupation that listens to the sound, the kindness of the person who acts, or the auditory formation authentication or the score is taken. I wonder if I can do it in the future, I think it would be nice to do it. If you have a physical backing in the act of listening to the sound, the evaluation indicators can be responsible or properly evaluated, and you will be able to express them accurately in physical terms. See. In that case, I think that it can be a sound development of the sound of sound, or that kind of thing. So, while working at a university, I worked a little more, and if I could do a hearing formation test, in the future so that it would be like a skill test, and even ordinary people or those who do not work. If I could, I would like to have the Japanese way to listen to the sound itself in the right direction. Japanese is a very convenient thing called onomatopoeia, so it is a sides of the same coin. It was good to be able to share using onomatopoeia, so it was not necessary to represent the physical quantity, but the quality associated with the onomatopoeia varies from individual to individual, so if it is not, it is industrial. I think it's very effective.
Hamasaki: Onomatopoeic words are also fun, in a sense, in a sense, that seems to be expressed in words in words. Probably, making new words, young people love, and new words are born. Twenty years ago, the onomatopoeia used by those who like audio and the onomatopoeia used by music fans in audio, which are currently listening to earphones and headphones. There is a pleasure to make a unique expression. So, if you forcibly express it physically, you will take the fun. However, in order to tell the other party accurately, for example, it is not a training that can do such a little physical expression, but if ordinary people can do that kind of experience, people who are interested. I think there is definitely.
Kawahara: So, for a few more years ago, there was a story about how to spread hearing formation, but especially in the industry, I have to hurry. It looks like it's getting feeling, so I'm thinking of trying to move when I can move. For example, when a capacity test is conducted, we have an image of the frequency of the octave interval, and we will meet on the premise that the difference in the level of sound pressure, such as 5DB, 2DB, 3DB, and the sound pressure level. I don't think so, so it's a completely different, so I'd like to do a way to spread everyone to be happy while incorporating the needs of the industry. Probably, I feel that I realize the difference in sound, which is actually a language education or something like that. Now, the Ministry of Education, Culture, Sports, Science and Technology has emphasized listening, so don't listen to English sentences suddenly, don't listen to English, but to distinguish whether the sound is different, or it looks like a sea show test. I think that it is possible for one hearing formation to experience what to pay attention to by doing something.
Hamasaki: Now, I have a language story, but this may be just my personal experience, but everyone is the same. Language is basically talking about speaking, and especially hearings don't go up to the linear. At one point, it suddenly sounds quickly and can be understood. Also, if you do so, you will get a wall, and if you listen to it for a while, you will feel that your ability to hear a little step -shaped will increase. Training for hearing formation, for example, those who come in in the first grader, do not know the physics of sound, DB for the first time, those who can't imagine a frequency of 1 kHz, in the sense of discriminating. Like a language learning, you don't go to the linear, and at some point, you can make such a way to improve so that it sounds like a little open. Or do you go up every day?
Kawahara: I'm not able to analyze the details of the individual, but when I look at the answer situation, it seems that there is a milestone in training that I can understand, and then, a certain day. It looks like you've been able to hear it. As Mr. Hamazaki said earlier, he understood it at one time. I was training like a mountain with a frequency characteristic, for example, I don't say anything like listening to the sound of the guitar or paying attention to the drum tone. After training once, I tried to ask some people to interview people with a good score or tell me what you listen to. Then, if you refer to the next training, referring to who you said, and you said this way, and then you would be able to listen to it. I sometimes try to share the listening points instead of forcing a specific way of listening. Then, of course, it is good to have a clue to a different place, so it seems to be very popular to refer to it. So, it may be a feature of shared listening and EQ training, but since the tone changes and it sounds, it is a hearing formation to share how the training sound source was heard. I wonder if it will lead to the next step. I don't think it's a very effective way to improve the capabilities of the group instead of increasing the individual's abilities. I think it's rather important not only to train, but also to talk with everyone with the feeling of listening.
Hamasaki: From the viewpoint of hearing and vocational training, it is a company that makes sound as a living business, and several companies are actually training in the company. In other universities, the contents of the curriculum may be different, but there are art universities that are doing hearing. Is that the overall mechanism, the way of training for hearing formation, is that Kawahara -sensei is being supervised each time?
Kawahara: When introducing a company, there are many cases where you have consulted. In the case of universities, the OBs here are brought back, so it seems that they are practiced, so it is generally not consulted about the curriculum, but it is a usable equipment that can be obtained at that time. It depends. In the case of a company, there are times when there are relatively serious circumstances. In the case of a company, even in a company, even if it is an audio equipment, the development can be developed on a computer, a computer, and if you draw the button, you can see the frequency characteristics. The great company of the company said, "I'm worried recently. Everyone is looking at the graph towards the computer. Is that OK?" When I came to Kyushu University and demonstrated hearing formation, there were cases where I was introduced in top -down, such as "This is. What is needed for my company? Let's do this in the whole company." 。 At that time, there are cases where the curriculum was organized for a relatively long period of time, and a roadmap of beginner -level, intermediate edition, advanced knitting, and introduced it little by little. When I was helping a local venture company, if I did the hearing inside the company, the president there was a communication with the staff, such as the development of the factory, and the business person. However, it was impressive that you said it was really better. After all, I thought that training would be an opportunity to understand what each other was saying, but I spread it to related technicians as I wrote earlier, and it is the basis for listening to the sound. I was convinced that I came up with something that I could do. If you think you can listen to it, you can see what the engineer is saying, and when the engineer talks on a physical quantity, there are some ways to catch it. So, I wondered if such a place was important, and whether it was the effect of hearing formation.
Hamasaki: Perhaps the graduates who did this, from the hearing formation, and some, for example, depending on the site that handles the sound, they do something like on the job training, even if they are asking for extremely accurate accuracy. I'm going to sharpen it. After all, from the standpoint of experiencing such a thing, it is quite difficult to communicate just with impression expression. I'm trying to know, but I'm always worried about whether I really understand what I'm saying.
Kawahara: In that sense, it's not actually an audio industry, but in the mechanical industry, in the industry that is not an audio, there is an industry related to sound and noise, and those people are actually there. However, it seems that such a training, such as authentication and certification, whether you can make such a thing, there is also a way of listening to the sound. I have to proceed as I am attracting attention.
>> Read more: Vol.1-6 "Acoustic Education and Temperature Audio"
