Endoscope system

An endoscope system comprising:

• a light source configured to generate and emit pulsed light;
• an endoscope device having an image sensor configured to captures images of an inside of a subject in accordance with timing for generating the pulsed light by the light source and output an image signal;
• a processing device configured to control the light source and the endoscope device and process the image signal;
• a sound collection unit having a first microphone and a second microphone to collect sound and having a wired connection to the processing device;
• a holding member for fixedly holding the first microphone and the second microphone in a certain positional relationship at a location separated from the subject;
• and
• a positional relationship acquisition unit configured to acquire values indicating positional relationships between the first microphone, the second microphone, and the subject,
• wherein the processing device comprises:
• a vibrational frequency detection unit configured to extract a vibrational frequency of first sound emitted by the subject from the sound collected by the first microphone and the second microphone, based on the values indicating the positional relationships between the first microphone, the second microphone, and the subject acquired by the positional relationship acquisition unit;
• and
• a light source controller configured to control the light source to generate the pulsed light in accordance with the vibrational frequency of the first sound extracted by the vibrational frequency detection unit.