Sound environment simulator using a computer simulation and a method of analyzing a sound space

A sound environment simulator comprising:

• echotime pattern computing means for computing an echotime pattern of a space to be analyzed by a geometric method based on the theory of acoustics with input data as to the conditions of said space, including analysis data setting means for setting analysis data by receiving analysis condition data including a shape and physical data of walls of said space, dividing said walls into a set of certain sections, and setting a virtual sound source and a virtual sound receiving point at respective arbitrary positions within said space;
• time series data computing means for computing time series data related to arrival volume of a sound emanated from said virtual sound source to said virtual sound receiving point;
• data transducing means for transducing said time series data related to the arrival volume into the echotime pattern by a certain data interpolation;
• impulse response computing means for computing an impulse response by computing a response for each frequency band from said echotime pattern and compositing all of said responses together;
• sound field reproducing means for generating reproduced sound data by convolution of said impulse response on non-reverberant sound source data;
• and
• output means for outputting a sound by transducing said reproduced sound data.

A sound environment simulator comprising:

• analysis data setting means for setting analysis data by receiving analysis condition data including a shape and physical data of walls of said space, dividing said walls into a set of certain sections, and setting a virtual sound source and a virtual sound receiving point at an arbitrary position within said space;
• echotime pattern computing means for computing an echotime pattern at a receiving point of a sound emanated from a sound source placed arbitrarily in a space to be analyzed;
• varying means for varying the relative position of the virtual sound receiving point and the virtual sound source in the space to be analyzed;
• and
• output means for outputting a sound based on the echotime pattern.

A sound environment simulator comprising:

• analysis data setting means for setting analysis data by receiving analysis condition data including a shape and physical data of walls of said space, dividing said walls into a set of certain sections, and setting a virtual sound source and a virtual sound receiving point at an arbitrary position within said space;
• echotime pattern computing means for computing an echotime pattern at a receiving point of a sound emanated from a sound source placed arbitrarily in a space to be analyzed, including time series data computing means for computing time series data related to arrival volume of a sound emanated from said virtual sound source to said virtual sound receiving point;
• and
• data transducing means for transducing said time series data related to the arrival volume into an echotime pattern by certain data interpolation.

A sound environment simulator comprising:

• sound field reproducing means for generating reproduced sound data by convolution of non-reverberant sound source data and impulse response data, including dry source input means for inputting the non-reverberant sound source data;
• head transfer function storing means for storing data related to a head transfer function;
• location data detecting means for detecting data related to at least one of a listener's head location and a listener's head direction;
• reproduced data generating means for generating data related to a reproduced sound by extracting and convoluting said impulse response and said head transfer function corresponding to said detected location data on said non-reverberant sound source data;
• and
• output means for outputting a sound by transducing said reproduced sound data.

An apparatus for analyzing a sound space comprising:

• means for setting analysis conditions, including a memory for storing data of a shape of a space to be analyzed and physical data of walls thereof, a set of predetermined sections by dividing the physical data of the walls, a virtual sound source and a virtual sound receiving point;
• means for computing time series data related to arrival volume of a sound emanated from said virtual sound source to said virtual sound receiving point for each incident direction and for predetermined frequency bands;
• and
• means for computing an echotime pattern by data interpolation to said time series data and providing a corresponding signal.

A sound environment simulator comprising:

• means for setting analysis conditions, including a memory for storing data of a shape of a space to be analyzed and physical data of walls thereof, a set of predetermined sections by dividing the physical data of the walls, a virtual sound source and a virtual sound receiving point;
• means for computing time series data related to arrival volume of a sound emanated from said virtual sound source to said virtual sound receiving point for each incident direction and for predetermined frequency bands;
• means for computing an echotime pattern by data interpolation to said time series data and providing a corresponding signal;
• and
• means for outputting a sound based on the time series data and echo time pattern corresponding signal.