Question 3 Calculate the directivity index of the source at the angles stated in the following table

Question 3
Calculate the directivity index of the source at the angles stated in the following table. A source is located at the center of the floor in a semi-anechoic enclosure. The table shows the sound pressure levels (La) measured at floor level and 10 meters from the center of the source in various angles (𝜃) are:

Question 3 Calculate the directivity index of the source at the angles stated in the following table. A source is located at the centre of the floor in a semi-anechoic enclosure. The table shows the sound pressure levels (La) measured at floor level and 10 metres from the centre of the source in various angles (0) are: Table Q3 Sound pressure levels at floor level in various angles (0) Angle (0) 0 30 60 90 SPL (dB) 70 71 68 69 (8 marks)

 

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