| 70 db | A | B

| 72 db | C | C

| 72 db | | A

| 72 db | | B

| 68 db | B | B

| 69 db | | A

| 71 db | | B

| 0 db

| 70 db | D | B

| 72 db | D | C

| 71 db | D | C

| 72 db | D | C

| 72 db | D | C

| 70 db | D | B

| 71 db | | B

| 69 db | | A

| 71 db | | B

| 68 db | | C

| 69 db | | B

| 70 db | | B

| 69 db | A | B

| 71 db | B | B

| 70 db | | C

| 69 db | A | B