JP2003008450A - Nature sound fm radio wave transmitter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem of a conventional nature sound listening system that has had constraints of needing an operating cost to a degree and a service life not being semi-permanent because a music CD storing nature sounds naturally requires a CD player and the operation in an automobile has needed the CD player. SOLUTION: Changing a sound source of nature sounds into a semiconductor ROM chip from a CD medium brings the service life of the sound source into semi-permanent, an internal memory of the semiconductor ROM chip is connected to be capable of endless operation, and a nature sound audio output is applied to a modulation input of an FM radio wave transmission circuit so as to allow a listener to listen to nature sounds through a free frequency not occupied by broadcast programs of an FM radio receiver placed in the vicinity of the FM transmitter. The internal memory of the nature sound semiconductor ROM chip is divided into about 6 sections, the listener can externally select any of the sections by using pushbutton switches S1-S6 and the chip inside is configured so that various different nature sounds can respectively be endless for the listening operation.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for recording various natural environment sounds and reproducing and listening in a living environment. 2. Description of the Related Art Conventionally, various environmental sounds recorded on a music CD have been sold. Further, in a system using a semiconductor chip, there is already a system in which a ROM chip for recording environmental sound, an amplifier, and a speaker are integrated. [0003] As described in the previous section, since the environmental sound is contained in a music CD, a CD player is naturally required, and since the CD player is operated by a motor, the operating cost is low. There is a limit to some extent and the service life is not semi-permanent.
Player needed. By changing the sound source of the environmental sound from a CD medium to a semiconductor ROM chip, the life of the sound source is made semi-permanent, and the internal memory of the semiconductor ROM chip is connected so as to operate endlessly. By adding the sound audio output to the modulation input of the FM radio wave transmission circuit, the environmental sound can be heard by the FM receiver placed near the FM transmitter. [0005] A sound source recording of environmental sounds is recorded using a digital sound stereo recorder, and then edited and stored in a semiconductor ROM chip. The ROM chip stores several kinds of environmental sounds so that they can be selected from outside, and furthermore, each environmental sound memory information is operated endlessly in the chip. The environmental sound semiconductor ROM chip is made into a cassette type, housed in a case, and if a part of the case is detachable for connecting to an FM radio wave transmitting circuit, several kinds of environmental sound cassettes can be exchanged. The FM radio wave transmission circuit is a weak radio wave transmission circuit composed of two transistors, and the frequency of the transmission radio wave is selected by selecting a vacant frequency of the broadcast radio wave in the FM broadcast radio wave reception band and used. The transmitted radio wave intensity is sufficiently practical if it operates within a radius of 5 m from the antenna of a general FM radio. FIG. 1 shows a circuit of one embodiment of the function of the present invention described in the preceding section. The environmental sound of the IC-1 The semiconductor ROM chip divides the internal memory into sections of about six divisions as described above so that the external memory can be selected by the push button switches S1 to S6 so that various different environmental sounds, for example, S1 is Ogawa's S2 is the sound of a bird, S3 is the tide of the shore, S4 is the sound of rain, S5 is the sound of thunderstorm, and S6 is the sound of insects. If the connection with the FM radio wave transmission circuit is of the above-mentioned socket detachable type, other new environmental sound RO
This function can be replaced with an M chip unit, but if a low cost type is to be used, this function is omitted and the ROM chip is directly connected to the FM radio wave transmission circuit on the board. Since the antenna is received at a short distance, wiring in the case is sufficient. Since the power supply has a small operating current, two AA or AAA batteries 3V are sufficient for practical use, which is convenient when operated by a car radio or the like. As described above, by using the apparatus of the present invention, it is possible to economically listen to environmental sounds for a long time only with a widely used FM radio without using a CD player. FM that receives environmental sounds within the range of radio waves
The number of radios does not matter. If the circuit configuration of the apparatus is simplified to the utmost extent and the idea of a product is toy-like, it is not impossible to provide it at a lower cost than a CD board. If the environmental sound semiconductor ROM chip is a detachable socket type and a recordable RAM type chip, it is also possible to reproduce the environmental sound that has been independently recorded by yourself, and to double the enjoyment. The size of the device can be reduced, and it can be placed on an FM radio, so there is no need to worry about the reach of FM radio waves. Even when used for a car radio, if this device is placed near the car antenna in the car, Good and easy to use. The purpose of the present invention is to provide inexpensive and easy-to-use natural environment sounds that are necessary for mental health, which is beginning to be required especially recently, and are effective for healing the mind.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram of an environmental sound FM radio wave transmitting apparatus according to a first embodiment of the present invention. [Description of Symbols] IC1 Environmental sound recording semiconductor ROM chip SW Power switch B Power batteries S1 to S6 Various environmental sound selection Push button switches R1 to R5 Fixed resistors C1 to C6 Capacitor TR1 Transistor for FM modulation and FM radio oscillation circuit TR2 Transistor for FM radio wave amplification and buffer stage L1 FM radio oscillation and frequency adjustment coil A FM radio transmission antenna (inside the case) Wiring antenna)

Claims (1)

Claims 1. An environmental sound recorded by a sound recorder is recorded by a semiconductor RO.
M chip, and the audio output of this chip is FM
An environmental sound recording semiconductor ROM chip, in which, by adding to a modulation input of a radio wave transmitting circuit, a radio wave transmitted by the FM radio wave transmitting circuit can be received by an FM radio wave receiver capable of receiving the environmental sound. And an FM sound wave transmission circuit, comprising: