RoomSimulator: a room impulse response simulator implemented in python

RoomSimulator is developed on the basis of RoomSim (github) developed by D. R. Campbell

RoomSimulator/
├── AxisTransform.py 
├── DelayFilter.py
├── Directivity.py
├── log  
├── plot_cube.py
├── Receiver.py  
├── Reverb.py
├── Room.py
├── RoomSim.py
├── SENSOR
├── Source.py
├── utils.py
└── validation

Usages

room_config = configparser.ConfigParser()
# Configuration of room
room_config['Room'] = {
    'size': '4, 4, 4',
    'RT60': ', '.join([f'{item}' for item in np.ones(6) * 0.2]),
    'A': '',
    'Fs': 44100,
    'reflect_order': -1,
    'HP_cutoff': 100}

# Configuration of microphones
# two ears of listener
receiver_config = configparser.ConfigParser()
receiver_config['Receiver'] = {
    'pos': '2, 2, 2',
    'view': '0, 0, 0',
    'n_mic': '2'}
head_r = 0.145/2
receiver_config['Mic_0'] = {
    'pos': f'0, {head_r}, 0',
    'view': '0, 0, 90',
    'direct_type': 'binaural_L'}
receiver_config['Mic_1'] = {
    'pos': f'0, {-head_r}, 0',
    'view': '0, 0, -90',
    'direct_type': 'binaural_R'}

roomsim = RoomSim(room_config=room_config, source_config=None, receiver_config=receiver_config)

# configuration of sound source
azi = 0
azi_rad = azi/180*np.pi
source_config = configparser.ConfigParser()
source_config['Source'] = {
    'pos': f'{2+1*np.cos(azi_rad)}, {2+np.sin(azi_rad)}, 2',
    'view': '0, 0, 0',
    'directivity':'omnidirectional'}
roomsim.load_source_config(source_config)
fig, ax = roomsim.show()
ax.view_init(elev=60, azim=30)
fig.savefig(f'img/room.png', dpi=200)
plt.close(fig)

fig, ax = roomsim.cal_all_img(is_plot=True)
fig.savefig('img/image_sources.png')

rir = roomsim.cal_ir_mic(is_verbose=False, img_dir='img/verbose')
np.save('rir.npy', rir)

Moving the sound source around the microphones. All image sound sources whose delays are smaller then the RT60

visualizing the calculating procedure of RIR

Validation

Comparison with RoomSim under the same settings of room, microphones and sound source.

Difference:

The restriction on how many image sources are considered, which is relaxed in RoomSimulator
Delay filter(allowing fraction delays) is adopted in RoomSimulator but not in RoomSim