JP2010263595A - Way of listening to sound, and method and apparatus for trial listening of recording therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound collector which strictly captures features of temporal variation of a sound source in order to collect and listen to sounds as acoustically good tones. <P>SOLUTION: A sound receiving system is provided which is characterized in that sound is collected by a sound collector in which a tapered resonance pipe array, having an opening, resonating to a frequency component of approximately integer multiple is mounted as a cap of a microphone, amplified by an amplifier and listened together with direct sound by wearing an open type earphone in the ear, or that sound is listened together with direct sound from a plurality of compact speakers disposed near a listener in place of the earphone. The sound collector is formed in a cap shape and mounted in a compact condenser microphone, for example, as a microphone cap. The sound collector is comprised of a tapered resonance pipe array, having an opening, resonating to a frequency component of approximately integer multiple. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention provides a sound collecting device in which a tapered resonance tube array having an opening that resonates with a frequency component that is approximately an integral multiple is attached to a cap of a condenser microphone in order to collect and listen to sound as an acoustically good tone. A sound characterized by arranging at least one device in the sound field space, collecting sound, amplifying it with an amplifier, and listening to it directly with a plurality of small speakers arranged near the listener It is a enjoyment system.

  As a place to enjoy listening to music, there are a case of listening to music on audio and television, a case of listening to music in a concert hall, and a case of listening to music with the characteristics of the sound field as it is without a sound device especially at a small concert venue. In some cases, the concert is listened to outdoors. In sports watching at the stadium, there is little acoustic consideration and there is almost no acoustic presence. There is a need for a method of listening to acoustically better sounds with a sense of presence.

When listening to music on audio or television, it is customary to listen with a speaker system or headphones or earphones that are conventionally used in ordinary homes. The sound field support method has been proposed mainly as a method of controlling by adding reverberation, but it has not been established as a method to enrich the tone of the sound source. Not shown (Patent Document 1).
An audio device is built in a luxury passenger car and listens to music with FM radio and CD. The interior of the passenger car is highly sound-absorbing and quiet, but it has a good acoustic sound and cannot be said to be a clear tone (Patent Literature). 4).
Recently, a small movie theater is set up in a corner of the building, and the number of venues for enjoying movies is increasing. The sound equipment is based on a conventional speaker system, and has a realistic sound that matches the image.
Recently, music therapy has been conducted to listen to music, but the system that provides the music is not necessarily ideal and the effect is sufficient. It is difficult (Patent Documents 2 and 3).

  When listening to music in a concert hall, support is provided by a PA device, which not only impairs performance but does not necessarily reach the audience with a good tone (Non-patent Document 5). In classical concerts, you will hear unsatisfactory music due to the effects of hall acoustics. Most of the venues for small concerts are listened to with the characteristics of the sound field as it is without any sound equipment.

In sports watching at the stadium, you will be watching the live radio or TV announcements through earphones, but there is little acoustic consideration and there is little acoustic presence.
[1] JP 2006-245669 [2] JP 2006-72282 [3] JP 2007-114632 [4] JP 2001-71924 [5] Support of electroacoustics in theater-Experimental meeting (2001.1.18), JATET, Vol. 45

Here, the frequency band of the sound wave is assumed to be 500 Hz or less as a low frequency, 500 Hz to 2 kHz as a middle frequency, and 2 kHz to 8 kHz as a high frequency. When harmonic components or high-frequency sounds contained in sound waves are radiated into the air from sound sources such as sound sources or speakers, they are propagated while being reflected by reflectors and walls in the sound field space, and are absorbed and attenuated. Reach the ear. Therefore, in practice, a sound with less harmonics than the sound quality in the vicinity of the sound source or sounding body is heard. In particular, the impact sound and the noise component at the time of pronunciation are weakened, and the rise of the sound and the transient sound are difficult to be transmitted. As a result, you will hear a sound with an unclear sense of sound and a lack of spaciousness. Here, it becomes a problem to improve such problems in the sound field where sounds and music are heard. Even in the performance of a piano with the widest range, it is difficult for the listener to transmit high-frequency sounds. In general, not only the piano, but the sound of musical instruments contains a lot of harmonic components, which is almost an integer multiple of the fundamental frequency component. As it decays quickly, it is difficult to reach the listener.
In order to collect and listen to sound as an acoustically good timbre, the present invention has a problem of how to capture and specify a sound having such characteristics faithfully in a sound source. Moreover, the question is how exactly the characteristics of temporal variation can be grasped. To that end, the following three issues to be solved are set.
(1) Type of sound collector, sound collection method and how to listen to sound (2) Sound collection and recording method by sound collector (3) Method of replaying and listening to recordings collected by sound collector By showing a solution, it is possible to modelly show a process in which sound waves propagate in the air, reach the ear, and are captured and enjoyed by the auditory sense.

As a means to solve the problem,
At least one sound pickup device that mounts a tapered resonance tube array having an opening as a cap of a microphone that resonates with a frequency component that is approximately an integral multiple of the frequency component is arranged in the sound field space. Enjoy listening with direct sound by using multiple earphones that are either amplified and opened with earphones attached to your ears, or with multiple small speakers placed near the listener instead of earphones Provide a system.
The sound collector is formed in a cap shape, and is attached to a small condenser microphone as a microphone cap, for example. The sound pickup device is composed of a tapered resonance tube array having an opening that resonates with a frequency component that is approximately an integral multiple. The resonance tubes constituting the array are linear with a center of approximately 180 degrees and are connected to the resonance tube of the same shape, and are connected to the microphone end face at the cap portion. The length of the resonance tube is L / 2, the shortest is L / 2, and the space is divided into 6 to 12 and arranged radially around the entire circumference of the cap to form a resonance tube array.

  The effect of using a simplified sound collector will be described. FIG. 1 shows a two-way type sound collector. In FIG. 1, the resonance tube array is constructed by linearly interpolating the length by dividing the 90-degree angle between the axes of the resonance tubes of lengths L and L / 2 and dividing the 90 degrees. Resonance sharpness (Q value) of each resonance tube is relatively dull and resonates in a relatively wide band. The primary resonance frequency f1 of the L and L / 2 resonance tubes resonates in an octave relationship, and the resonance frequency is interpolated in the resonance tube between them. That is, resonance occurs at almost all frequencies, and incident sound can be amplified and captured. The acoustic effects of the pair of resonance tubes constituting the resonance tube array will be described as an example. When both ends of the pair of resonance tubes are open, resonance occurs at a frequency determined by the length and shape (taper) of the pipe, and the resonance frequencies f1, f2, f3,. In each order mode, a high sound pressure (approximately +10 dB) is obtained at the center of the cap, that is, at the tip of the microphone. The length of the resonance tube is L / 2 where the shortest is L / 2, and in the resonance tube array having a length of 6-12 splitting between them, f1 of each pair of resonance tubes is approximately one semitone to one tone, Therefore, the range of one octave is almost covered, and the higher order components are also supported. Therefore, the sound wave incident from the opening of the resonance tube array has an advantage that the resonance frequency component is amplified and is characterized by timbre and detected by the microphone. Since the opening is axially arranged, the three-dimensional sound is captured by the binaural effect.

  A tapered resonance tube array with openings that resonate with frequency components that are almost integral multiples is collected by a sound collector that is attached as a microphone cap, amplified by an amplifier, and an open earphone is attached to the ear. Thus, a sound enjoyment system characterized by listening with direct sound is provided. The sound collector is formed in a cap shape, and is attached to a small condenser microphone as a microphone cap, for example. The sound pickup device is composed of a tapered resonance tube array having an opening that resonates with a frequency component that is approximately an integral multiple. The resonance tubes constituting the array are linear with a center of approximately 180 degrees and are connected to the resonance tubes of the same length, and are connected to the microphone end face at the cap portion. The length of the resonance tube is L / 2, and the shortest is L / 2. The resonance tube is divided into 12 portions and arranged radially around the entire cap to form a resonance tube array.

  A tapered resonance tube array 2 having an opening 1 that resonates with a frequency component that is substantially an integral multiple is collected by a sound collector characterized by being attached to a microphone cap 3, and amplified by an amplifier and received. The sound receiving system is characterized by listening to a direct sound with a plurality of small speakers arranged close to a listener.

  A signal collected by a sound collector characterized by mounting a taper-shaped resonance tube array 2 having an opening 1 that resonates with a substantially integral frequency component in a microphone cap 3, and amplified by an amplifier; A sound recording method and apparatus characterized by mixing a signal collected by another ordinary condenser microphone and recording it on a recorder.

  The sound source signal recorded by the recording device described in the second embodiment is distributed in real time as a live broadcast or as a recorded rebroadcast, and individually played back on the receiving side, and the direct sound is placed near the earphone or listener A listening method and apparatus characterized by listening through a small speaker.

It can be applied when listening to music on audio or television at home. In ordinary homes, it is customary to listen with a conventional speaker system or with headphones or earphones. The sound field support method has been proposed mainly as a method of controlling by adding reverberation, but it has not been established as a method to enrich the tone of the sound source, and the spread of equipment due to acoustic discomfort has not been established. Not shown. According to this patent, it is possible to enjoy high-quality music with a rich sense of reality by the effect of a simple sound collector.
It can be applied to music listening as music therapy. In music therapy, it is hard to say that the system that provides music is not necessarily ideal and its effect is sufficient. If a small speaker, not an earphone, is arranged near the listener, it is possible to listen safely without the hassle and restraint of wires and the like.
Application to listening to music in a concert hall is possible. In the hall, support is provided by a PA device, which not only impairs performance but does not necessarily reach the audience with a good tone. In classical concerts, you will hear unsatisfactory music due to the effects of hall acoustics. Most of the venues for small concerts are listened to with the characteristics of the sound field as it is without any sound equipment. A plurality of sound collectors for collecting sound may be arranged in the field and mixed as appropriate. Multi-channel earphones can be permanently installed as acoustic equipment for the hall for listeners. Alternatively, a system in which a plurality of speakers are arranged on the surrounding wall surface and no earphone is used may be used. This system can also be applied to movie theaters.
In sporting events such as sports broadcasts, broadcasts with a sense of presence can be made by multiplexing the sound effect sound collected by the sound collectors at multiple spatial positions in the stadium with the commentary from the announcer. This can be recorded, distributed on broadcast media as a live broadcast, or distributed to audience seats in the venue.
Applicable to listening to concerts outdoors. In outdoor concerts, depending on the PA equipment and the reverberation board, the music is affected by the sound field, and the music is very poor because it has few high-frequency components. A sound field rich in sound quality can be created by arranging a plurality of speakers around the audience.
It can be applied to music listening systems in luxury passenger cars. A luxury passenger car has an audio device built in and listens to music with FM radio or CD. The interior of the passenger car is sound-absorbing and quiet, but it has a good acoustic sound and cannot be said to have a clear tone. If a small speaker instead of the earphone is arranged in or near the headrest, it is possible to travel safely without the hassle and restraint of wires.
High-quality music will be useful for promoting milking cows and raising premium Japanese beef. It will also be effective in promoting the growth of yeast. In these cases, in addition to the speaker for reproduction, a small speaker is arranged near the yeast instead of the earphone.

Example of sound collector; front view and plan view System configuration diagram of Embodiment 1 System configuration diagram of embodiment 2 System configuration diagram of embodiment 3

DESCRIPTION OF SYMBOLS 1 Opening part 2 Resonance tube array 3 Microphone cap part (microphone mounting part)

Claims (3)

  At least one sound pickup device, in which a tapered resonance tube array having an opening that resonates with a frequency component of almost an integral multiple, is mounted as a microphone cap, is arranged in the sound field space, and thereby, the sound is collected. A system for listening to sound, which is amplified by an amplifier and listened to directly with a plurality of small speakers arranged near the listener.   The sound collector according to claim 1 is arranged at one or more positions in the sound field space, and the sound collected and amplified by the amplifier is mixed with the signal collected by another microphone and recorded on the recorder. Sound recording method and apparatus characterized by the above.   A sound source signal recorded by the recording device according to claim 2 is distributed and reproduced individually on the receiving side, and both direct sound is listened to by an earphone or a small speaker arranged near the listener. Method and apparatus.

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