| 70 db | C | C

| 71 db | D | B

| 71 db | | C

| 70 db | | B

| 70 db | D | C

| 71 db | D | B

| 72 db | | B

| 72 db | | B

| 73 db | | C

| 72 db | | B

| 0 db

| 71 db | | B

| 70 db | | C

| 71 db | | C

| 70 db | | B

| 71 db | | B

| 71 db | | B

| 70 db | C | C

| 71 db | | B

| 71 db | D | B

| 70 db | D | C

| 73 db | | C

| 72 db | D | C

| 71 db | | B