Information processing method, information processing device, and recording medium

An information processing method, comprising:

• obtaining an audio signal that represents sound collected by a sound collecting device;
• calculating, using the audio signal obtained, a volume of the sound collected by the sound collecting device;
• identifying, using the audio signal obtained, a type of a sound source of the sound collected by the sound collecting device;
• estimating a distance between the sound collecting device and the sound source of the sound collected by the sound collecting device based on a standard volume and the volume calculated, the standard volume being (i) stored in a database in which the type of the sound source and the standard volume are preassociated with each other, (ii) the volume of the sound from the sound source at a predetermined distance, and (iii) associated with the type of the sound source identified;
• and
• outputting an estimation result,
• wherein the type of the sound source of the sound collected by the sound collecting device is identified using (i) a trained model trained with an audio signal that represents an optional sound as input data, and a type of a sound source of the optional sound as label data, and (ii) the audio signal obtained.

An information processing device, comprising:

• an audio signal obtainer that obtains an audio signal that represents sound collected by a sound collecting device;
• a calculator that calculates, using the audio signal obtained, a volume of the sound collected by the sound collecting device;
• an identifier that identifies, using the audio signal obtained, a type of a sound source of the sound collected by the sound collecting device;
• an estimator that estimates a distance between the sound collecting device and the sound source of the sound collected by the sound collecting device based on a standard volume and the volume calculated, the standard volume being (i) stored in a database in which the type of the sound source and the standard volume are preassociated with each other, (ii) the volume of the sound from the sound source at a predetermined distance, and (iii) associated with the type of the sound source identified;
• and
• an outputter that outputs an estimation result,
• wherein the distance is estimated based on a relational expression that is predetermined and denotes a relationship between (i) an amount of attenuation of the volume calculated with respect to the standard volume and (ii) the distance.

An information processing device, comprising:

• an audio signal obtainer that obtains an audio signal that represents sound collected by a sound collecting device;
• a calculator that calculates, using the audio signal obtained, a volume of the sound collected by the sound collecting device;
• an identifier that identifies, using the audio signal obtained, a type of a sound source of the sound collected by the sound collecting device;
• an estimator that estimates a distance between the sound collecting device and the sound source of the sound collected by the sound collecting device based on a standard volume and the volume calculated, the standard volume being (i) stored in a database in which the type of the sound source and the standard volume are preassociated with each other, (ii) the volume of the sound from the sound source at a predetermined distance, and (iii) associated with the type of the sound source identified;
• and
• an outputter that outputs an estimation result,
• wherein the type of the sound source of the sound collected by the sound collecting device is identified using (i) a trained model trained with an audio signal that represents an optional sound as input data, and a type of a sound source of the optional sound as label data, and (ii) the audio signal obtained.